Compounds and compositions as TLR activity modulators

1. A compound of Formula (I-A), or pharmaceutically acceptable salt thereof:

wherein:

X 3 is N;

X 4 is CR 3 ;

X 5 is —CR 4 ═CR 5 —;

R 3 is H;

R 4 is H;

R 5 is selected from halogen, —C(O)OR 7 , —C(O)R 7 , —C(O)N(R 11 R 12 ), —N(R 11 R 12 ), —N(R 9 ) 2 , —NHN(R 9 ) 2 , —SR 7 , —(CH 2 ) n OR 7 , —(CH 2 ) n R 7 , -LR 10 , —OLR 8 , —OLR 10 , C 1 -C 6 alkyl, C 1 -C 6 heteroalkyl, C 1 -C 6 haloalkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, aryl, heteroaryl, C 3 -C 8 cycloalkyl, and C 3 -C 8 heterocycloalkyl, wherein the C 1 -C 6 alkyl, C 1 -C 6 heteroalkyl, C 1 -C 6 haloalkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, aryl, heteroaryl, C 3 -C 8 cycloalkyl, and C 3 -C 8 heterocycloalkyl groups of R 5 are each optionally substituted with 1 to 3 substituents independently selected from halogen, —CN, —NO 2 , —R 7 , —OR 8 , —C(O)R 8 , —OC(O)R 8 , —C(O)OR 8 , —N(R 9 ) 2 , —P(O)(OR 8 ) 2 , —OP(O)(OR 8 ) 2 , —P(O)(OR 10 ) 2 , —OP(O)(OR 10 ) 2 , —C(O)N(R 9 ) 2 , —S(O) 2 R 8 , —S(O)R 8 , —S(O) 2 N(R 9 ) 2 , and —NR 9 S(O) 2 R 8 ;

each L is independently selected from a bond, —(O(CH 2 ) m ) t —, C 1 -C 6 alkyl, C 2 -C 6 alkenylene and C 2 -C 6 alkynylene, wherein the C 1 -C 6 alkyl, C 2 -C 6 alkenylene and C 2 -C 6 alkynylene of L are each optionally substituted with 1 to 4 substituents independently selected from halogen, —R 8 , —OR 8 , —N(R 9 ) 2 , —P(O)(OR 8 ) 2 , —OP(O)(OR 8 ) 2 , —P(O)(OR 10 ) 2 , and —OP(O)(OR 10 ) 2 ;

R 7 is selected from C 1 -C 6 alkyl, aryl, heteroaryl, C 3 -C 8 cycloalkyl, C 1 -C 6 heteroalkyl, C 1 -C 6 haloalkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, and C 3 -C 8 heterocycloalkyl, wherein the C 1 -C 6 alkyl, aryl, heteroaryl, C 3 -C 8 cycloalkyl, C 1 -C 6 heteroalkyl, C 1 -C 6 haloalkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, and C 3 -C 8 heterocycloalkyl groups of R 7 are each optionally substituted with 1 to 3 R 13 groups, and each R 13 is independently selected from halogen, —CN, -LR 9 , -LOR 9 , —OLR 9 , -LR 10 , -LOR 10 , —OLR 10 , -LR 8 , -LOR 8 , —OLR 8 , -LSR 8 , -LSR 10 , -LC(O)R 8 , —OLC(O)R 8 , -LC(O)OR 8 , -LC(O)R 10 , -LOC(O)OR 8 , -LC(O)NR 9 R 11 , -LC(O)NR 9 R 8 , -LN(R 9 ) 2 , -LNR 9 R 8 , -LNR 9 R 10 , -LC(O)N(R 9 ) 2 , -LS(O) 2 R 8 , -LS(O)R 8 , -LC(O)NR 8 OH, -LNR 9 C(O)R 8 , -LNR 9 C(O)OR 8 , -LS(O) 2 N(R 9 ) 2 , —OLS(O) 2 N(R 9 ) 2 , -LNR 9 S(O) 2 R 8 , -LC(O)NR 9 LN(R 9 ) 2 , -LP(O)(OR 8 ) 2 , -LOP(O)(OR 8 ) 2 , -LP(O)(OR 10 ) 2 and —OLP(O)(OR 10 ) 2 ;

each R 8 is independently selected from H, —CH(R 10 ) 2 , C 1 -C 8 alkyl, C 2 -C 8 alkene, C 2 -C 8 alkyne, C 1 -C 6 haloalkyl, C 1 -C 6 alkoxy, C 1 -C 6 heteroalkyl, C 3 -C 8 cycloalkyl, C 2 -C 8 heterocycloalkyl, C 1 -C 6 hydroxyalkyl and C 1 -C 6 haloalkoxy, wherein the C 1 -C 8 alkyl, C 8 alkene, C 2 -C 8 alkyne, C 1 -C 6 heteroalkyl, C 1 -C 6 haloalkyl, C 1 -C 6 alkoxy, C 3 -C 8 cycloalkyl, C 2 -C 8 heterocycloalkyl, C 1 -C 6 hydroxyalkyl and C 1 -C 6 haloalkoxy groups of R 8 are each optionally substituted with 1 to 3 substituents independently selected from —CN, R 11 , —OR 11 , —SR 11 , —C(O)R 11 , —OC(O)R 11 , —C(O)N(R 9 ) 2 , —C(O)OR 11 , —NR 9 C(O)R 11 , —NR 9 R 10 , —NR 11 R 12 , —N(R 9 ) 2 , —OR 9 , —OR 10 , —C(O)NR 11 R 12 , —C(O)NR 11 OH, —S(O) 2 R 11 , —S(O)R 11 , S(O) 2 NR 11 R 12 , —NR 11 S(O) 2 R 11 , —P(O)(OR 11 ) 2 , and —OP(O)(OR 11 ) 2 ;

each R 9 is independently selected from H, —C(O)R 8 , —C(O)OR 8 , —C(O)R 10 , —C(O)OR 10 , —S(O) 2 R 10 , —C 1 -C 6 alkyl, C 1 -C 6 heteroalkyl and C 3 -C 6 cycloalkyl, or each R 9 is independently a C 1 -C 6 alkyl that together with N they are attached to form a C 3 -C 8 heterocycloalkyl, wherein the C 3 -C 8 heterocycloalkyl ring optionally contains an additional heteroatom selected from N, O and S, and wherein the C 1 -C 6 alkyl, C 1 -C 6 heteroalkyl, C 3 -C 6 cycloalkyl, or C 3 -C 8 heterocycloalkyl groups of R 9 are each optionally substituted with 1 to 3 substituents independently selected from —CN, R 11 , —OR 11 , —SR 11 , —C(O)R 11 , —OC(O)R 11 , —C(O)OR 11 , —NR 11 R 12 , —C(O)NR 11 R 12 , —C(O)NR 11 OH, —S(O) 2 R 11 , —S(O)R 11 , —S(O) 2 NR 11 R 12 , —NR 11 S(O) 2 R 11 , —P(O)(OR 11 ) 2 , and —OP(O)(OR 11 ) 2 ;

each R 10 is independently selected from aryl, C 3 -C 8 cycloalkyl, C 3 -C 8 heterocycloalkyl and heteroaryl, wherein the aryl, C 3 -C 8 cycloalkyl, C 3 -C 8 heterocycloalkyl and heteroaryl groups are optionally substituted with 1 to 3 substituents selected from halogen, —R 8 , —OR 8 , -LR 9 , -LOR 9 , —N(R 9 ) 2 , —NR 9 C(O)R 8 , —NR 9 CO 2 R 8 , —CO 2 R 8 , —C(O)R 8 and —C(O)N(R 9 ) 2 ;

R 11 and R 12 are independently selected from H, C 1 -C 6 alkyl, C 1 -C 6 heteroalkyl, C 1 -C 6 haloalkyl, aryl, heteroaryl, C 3 -C 8 cycloalkyl, and C 3 -C 8 heterocycloalkyl, wherein the C 1 -C 6 alkyl, C 1 -C 6 heteroalkyl, C 1 -C 6 haloalkyl, aryl, heteroaryl, C 3 -C 8 cycloalkyl, and C 3 -C 8 heterocycloalkyl groups of R 11 and R 12 are each optionally substituted with 1 to 3 substituents independently selected from halogen, —CN, R 8 , —OR 8 , —C(O)R 8 , − OC(O)R 8 , —C(O)OR 8 , —N(R 9 ) 2 , —NR 8 C(O)R 8 , —NR 8 C(O)OR 8 , —C(O)N(R 9 ) 2 , C 3 -C 8 heterocycloalkyl, —S(O) 2 R 8 , —S(O) 2 N(R 9 ) 2 , —NR 9 S(O) 2 R 8 , C 1 -C 6 haloalkyl and C 1 -C 6 haloalkoxy;

or R 11 and R 12 are each independently C 1 -C 6 alkyl and taken together with the N atom to which they are attached form an optionally substituted C 3 -C 8 heterocycloalkyl ring optionally containing an additional heteroatom selected from N, O and S;

Ring A is phenyl or pyridyl, wherein the phenyl and pyridyl groups of Ring A are optionally substituted with 1 to 3 R A groups, wherein each R A is independently selected from —R 8 , —R 7 , —OR 7 , —OR 8 , —R 10 , —SR 8 , —NO 2 , —CN, —N(R 9 ) 2 , —NR 9 C(O)R 8 , —NR 9 C(S)R 8 , —NR 9 C(O)N(R 9 ) 2 , —NR 9 C(S)N(R 9 ) 2 , —NR 9 CO 2 R 8 , —NR 9 NR 9 C(O)R 8 , —NR 9 NR 9 C(O)N(R 9 ) 2 , —NR 9 NR 9 CO 2 R 8 , —C(O)C(O)R 8 , —C(O)CH 2 C(O)R 8 , —CO 2 R 8 , —(CH 2 ) n CO 2 R 8 , —C(O)R 8 , —C(S)R 8 , —C(O)N(R 9 ) 2 , —C(S)N(R 9 ) 2 , —OC(O)N(R 9 ) 2 , —OC(O)R 8 , —C(O)N(OR 8 )R 8 , —C(NOR 8 )R 8 , —S(O) 2 R 8 , —S(O) 3 R 8 , —SO 2 N(R 9 ) 2 , —S(O)R 8 , —NR 9 SO 2 N(R 9 ) 2 , —NR 9 SO 2 R 8 , —P(O)(OR 8 ) 2 , —OP(O)(OR 8 ) 2 , —P(O)(OR 10 ) 2 , —OP(O)(OR 10 ) 2 , —N(OR 8 )R 8 , —CH═CHCO 2 R 8 , —C(═NH)—N(R 9 ) 2 , and —(CH 2 ) n NHC(O)R 8 ; or two adjacent R A substituents on Ring A form a 5-6 membered ring that contains up to two heteroatoms as ring members;

n is, independently at each occurrence, 0, 1, 2, 3, 4, 5, 6, 7 or 8;

each m is independently selected from 1, 2, 3, 4, 5 and 6, and

t is 1, 2, 3, 4, 5, 6, 7 or 8.

2. The compound of claim 1 , wherein:

R 5 is selected from halogen, —C(O)OR 7 , —C(O)R 7 , —C(O)N(R 11 R 12 ), N(R 11 R 12 ), N(R 9 ) 2 , —NHN(R 9 ) 2 , -LR 10 , —OLR 8 , —OLR 10 , —SR 7 , —(CH 2 ) n OR 7 , —(CH 2 ) n R 7 , C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl, and C 1 -C 6 alkoxy, wherein the C 1 -C 6 alkyl, C 2 -C 8 alkenyl and C 2 -C 8 alkynyl groups R 5 are each optionally substituted with 1 to 3 substituents independently selected from halogen, —CN, —R 7 , —OR 8 , —C(O)R 8 , —OC(O)R 8 , —C(O)OR 8 , —N(R 9 ) 2 , —P(O)(OR 8 ) 2 , —OP(O)(OR 8 ) 2 , —P(O)(OR 10 ) 2 , —OP(O)(OR 10 ) 2 , —C(O)N(R 9 ) 2 , —S(O) 2 R 8 , —S(O) 2 N(R 9 ) 2 , and —NR 9 S(O) 2 R 8 ;

each L is independently selected from a bond, —(O(CH 2 ) m ) t —, and C 1 -C 6 alkylene, wherein the C 1 -C 6 alkylene of L is substituted with 1 substituent independently selected from —R 8 ;

R 7 is selected from C 1 -C 6 alkyl, phenyl, naphthyl, heteroaryl, C 3 -C 8 cycloalkyl and C 3 -C 8 heterocycloalkyl, wherein the C 1 -C 6 alkyl, phenyl, naphthyl, heteroaryl, C 3 -C 8 cycloalkyl and heterocycloalkyl groups of R 7 are each optionally substituted with 1 to 3 R 13 groups, and each R 13 is independently selected from halogen, —CN, -LR 9 , -LOR 9 , —OLR 9 , -LR 10 , -LOR 10 , —OLR 10 , LR 8 , -LOR 8 , —OLR 8 , -LSR 8 , -LSR 10 , -LC(O)R 8 , —OLC(O)R 8 , -LC(O)OR 8 , -LC(O)R 10 , -LOC(O)OR 8 , -LC(O)NR 9 R 11 , -LC(O)NR 9 R 8 , -LN(R 9 ) 2 , -LNR 9 R 8 , -LNR 9 R 10 , -LC(O)N(R 9 ) 2 , -LS(O) 2 R 8 , -LS (O)R 8 , -LC(O)NR 8 OH, -LNR 9 C(O)R 8 , -LNR 9 C(O)OR 8 , -LS(O) 2 N(R 9 ) 2 , —OLS(O) 2 N(R 9 ) 2 , -LNR 9 S(O) 2 R 8 , -LC(O)NR 9 LN(R 9 ) 2 , -LP(O)(OR 8 ) 2 , -LOP(O)(OR 8 ) 2 , -LP(O)(OR 10 ) 2 and —OLP(O)(OR 10 ) 2 ;

each R 8 is independently selected from H, —CH(R 10 ) 2 , C 1 -C 8 alkyl, C 2 -C 8 alkenyl, C 1 -C 6 haloalkyl, C 3 -C 8 cycloalkyl, C 2 -C 8 heterocycloalkyl,- and C 1 -C 6 hydroxyalkyl, wherein the C 1 -C 8 alkyl and C 2 -C 8 alkenyl, C 3 -C 8 cycloalkyl, and C 2 -C 8 heterocycloalkyl groups of R 8 are each optionally substituted with 1 to 3 substituents independently selected from —CN, R 11 , —OR 11 , —SR 11 , —C(O)R 11 , —OC(O)R 11 , —C(O)N(R 9 ) 2 , —C(O)OR 11 , —NR 9 C(O)R 11 , —NR 9 R 10 , NR 11 R 12 , —N(R 9 ) 2 , —OR 9 , —OR 10 , —C(O)NR 11 R 12 , —C(O)NR 11 OH, —S(O) 2 R 11 , —S(O)R 11 , —S(O) 2 NR 11 R 12 , —NR 11 S(O) 2 R 11 , —P(O)(OR 11 ) 2 , and —OP(O)(OR 11 ) 2 ;

each R 9 is independently selected from H, —C(O)R 8 , —C(O)OR 8 , —S(O) 2 R 10 , and —C 1 -C 6 alkyl, or each R 9 is independently a C 1 -C 6 alkyl that together with the N to which they are attached form a C 3 -C 8 heterocycloalkyl, wherein the C 1 -C 6 alkyl or heterocycloalkyl groups of R 9 are each optionally substituted with 1 to 2 substituents independently selected from —CN, R 11 , —OR 11 , —SR 11 , —C(O)R 11 , —OC(O)R 11 , —C(O)OR 11 , —NR 11 R 12 , —C(O)NR 11 R 12 , —C(O)NR 11 OH, —S(O) 2 R 11 —S(O) 2 NR 11 R 12 , —NR 11 S(O) 2 R 11 , —P(O)(OR 11 ) 2 , and —OP(O)(OR 11 ) 2 ;

each R 10 is independently selected from aryl, C 3 -C 8 cycloalkyl, C 3 -C 8 heterocycloalkyl and heteroaryl, wherein the aryl, C 3 -C 8 cycloalkyl, C 3 -C 8 heterocycloalkyl and heteroaryl groups are optionally substituted with 1 to 3 substituents selected from halogen, —R 8 , —OR 8 , -LR 9 , -LOR 9 , —N(R 9 ) 2 , —NR 9 C(O)R 8 , —NR 9 CO 2 R 8 , —CO 2 R 8 , —C(O)R 8 and —C(O)N(R 9 ) 2 ;

R 11 is selected from H, C 1 -C 6 alkyl, aryl, heteroaryl, C 3 -C 8 cycloalkyl, and C 3 -C 8 heterocycloalkyl;

R 12 is H or C 1 -C 6 alkyl;

Ring A is phenyl optionally substituted with 1 to 3 R A groups, wherein each R A is independently selected from —R 8 , —R 7 , —OR 7 , —OR 8 , —R 10 , —OR 10 , —SR 8 , —NO 2 , —CN, —N(R 9 ) 2 , —NR 9 C(O)R 8 , —NR 9 C(S)R 8 , —NR 9 C(O)N(R 9 ) 2 , —NR 9 C(S)N(R 9 ) 2 , —NR 9 CO 2 R 8 , —NR 9 NR 9 C(O)R 8 , —NR 9 NR 9 C(O)N(R 9 ) 2 , —NR 9 NR 9 CO 2 R 8 , —C(O)C(O)R 8 , —C(O)CH 2 C(O)R 8 , —CO 2 R 8 , —(CH 2 ) n CO 2 R 8 , —C(O)R 8 , —C(S)R 8 , —C(O)N(R 9 ) 2 , —C(S)N(R 9 ) 2 , —OC(O)N(R 9 ) 2 , —OC(O)R 8 , —C(O)N(OR 8 )R 8 , —C(NOR 8 )R 8 , —S(O) 2 R 8 , —S(O) 3 R 8 , —SO 2 N(R 9 ) 2 , —S(O)R 8 , —NR 9 SO 2 N(R 9 ) 2 , —NR 9 SO 2 R 8 , —P(O)(OR 8 ) 2 , —OP(O)(OR 8 ) 2 , —P(O)(OR 10 ) 2 , —OP(O)(OR 10 ) 2 , —N(OR 8 )R 8 , —CH═CHCO 2 R 8 , —C(═NH)—N(R 9 ) 2 , and —(CH 2 ) n NHC(O)R 8 ;

n is, independently at each occurrence, 1, 2, 3, 4, or 5;

each m is independently selected from 1, 2, 3, 4, 5 and 6, and

t is 1, 2, 3, or 4.

3. The compound of claim 2 , wherein the compound of Formula (I-A) is a compound of Formula (X-A):

4. The compound of claim 3 , wherein the compound of Formula (X-A) is a compound of Formula (XI):

5. The compound of claim 4 , wherein the compound of Formula (XI) is a compound of Formula (XIII):

6. The compound of claim 4 , wherein,

R 5 is selected from —C(O)OR 7 , —N(R 9 ) 2 , —NHN(R 9 ) 2 , -LR 10 , —(CH 2 ) n R 7 , —C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, C 2 -C 8 alkenyl, C 2 -C 8 alkynyl and C 1 -C 6 alkoxy, wherein the C 1 -C 6 alkyl, C 2 -C 8 alkenyl, and C 2 -C 8 alkynyl groups of R 5 are each optionally substituted with 1 to 3 substituents independently selected from halogen, —CN, —R 7 , —OR 8 , —C(O)R 8 , —OC(O)R 8 , —C(O)OR 8 , —N(R 9 ) 2 , —P(O)(OR 8 ) 2 , —OP(O)(OR 8 ) 2 , —P(O)(OR 10 ) 2 , —OP(O)(OR 10 ) 2 , —C(O)N(R 9 ) 2 , —S(O) 2 R 8 , —S(O) 2 N(R 9 ) 2 , and —NHS(O) 2 R 8 .

7. The compound of claim 6 , wherein,

R 5 is —(CH 2 ) n R 7 .

8. The compound of claim 7 , wherein,

R 7 is selected from phenyl, naphthyl, and heteroaryl, wherein the C 1 -C 6 alkyl, phenyl, naphthyl, and heteroaryl groups of R 7 are each-optionally substituted with 1 to 3 R 13 groups and each R 13 is independently selected from halogen, —CN, -LR 9 , -LOR 9 , —OLR 9 , -LR 10 , -LOR 10 , —OLR 10 , -LR 8 , -LOR 8 , —OLR 8 , -LSR 8 , -LSR 10 , -LC(O)R 8 , —OLC(O)R 8 , -LC(O)OR 8 , -LC(O)R 10 , -LOC(O)OR 8 , -LC(O)NR 9 R 11 , -LC(O)NR 9 R 8 , -LN(R 9 ) 2 , -LNR 9 R 8 , -LNR 9 R 10 , -LC(O)N(R 9 ) 2 , -LS(O) 2 R 8 , -LS(O)R 8 , -LC(O)NR 8 OH, -LNR 9 C(O)R 8 , -LNR 9 C(O)OR 8 , -LS(O) 2 N(R 9 ) 2 , —OLS(O) 2 N(R 9 ) 2 , -LNR 9 S(O) 2 R 8 , -LC(O)NR 9 LN(R 9 ) 2 , -LP(O)(OR 8 ) 2 , -LOP(O)(OR 8 ) 2 , -LP(O)(OR 10 ) 2 and —OLP(O)(OR 10 ) 2 .

9. The compound of claim 8 , wherein the compound is a compound of Formula (XVI):

10. The compound of claim 9 , wherein the compound is substituted with one to three R 13 groups selected from -LR 9 , -LOR 9 , —OLR 9 , -LR 10 , -LOR 10 , —OLR 10 , -LR 8 , -LOR 8 , —OLR 8 , -LSR 8 , -LSR 10 , -LC(O)R 8 , —OLC(O)R 8 , -LC(O)OR 8 , -LC(O)R 10 , -LOC(O)OR 8 , -LC(O)NR 9 R 11 , -LC(O)NR 9 R 8 , -LN(R 9 ) 2 , -LNR 9 R 8 , -LNR 9 R 10 , -LC(O)N(R 9 ) 2 , -LS(O) 2 R 8 LS(O)R 8 , -LC(O)NR 8 OH, -LNR 9 C(O)R 8 , -LNR 9 C(O)OR 8 , -LS(O) 2 N(R 9 ) 2 , —OLS(O) 2 N(R 9 ) 2 , -LNR 9 S(O) 2 R 8 , -LC(O)NR 9 LN(R 9 ) 2 , -LP(O)(OR 8 ) 2 , -LOP(O)(OR 8 ) 2 , -LP(O)(OR 10 ) 2 and —OLP(O)(OR 10 ) 2 .

11. The compound of claim 10 , wherein,

each R 13 is independently selected from halogen, C 1 -C 6 haloalkyl, -LR 8 , LR 9 , -LOR 8 and —OLR 8 and -LP(O)(OR 8 ) 2 .

12. The compound of claim 11 , wherein,

each R A is independently selected from —R 7 , —OR 7 , —R 8 , —OR 8 , —R 10 , —OR 10 , —SR 8 , —N(R 9 ) 2 , —S(O) 2 R 8 , —S(O) 3 R 8 , —SO 2 N(R 9 ) 2 , —S(O)R 8 , —NR 9 SO 2 N(R 9 ) 2 , —CH═CHCO 2 R 8 , (CH 2 ) n CO 2 R 8 , —NR 9 SO 2 R 8 , —P(O)(OR 8 ) 2 , —OP(O)(OR 8 ) 2 , —P(O)(OR 10 ) 2 , and —OP(O)(OR 10 ) 2 .

13. The compound of claim 12 , wherein,

R 8 is selected from H, C 1 -C 6 alkyl and C 1 -C 6 haloalkyl.

14. The compound of claim 9 , wherein the compound is substituted with two R 13 groups independently selected from —CH 3 , —CH 2 CH 3 , —CF 3 , —CH 2 OH, —OCH 3 , —COOCH 3 , —COOCH 2 CH 3 , F, Cl, Br, —CH 2 OCH 3 , CH 2 OCH 2 CH 3 , —N(CH 3 ) 2 , —((O(CH 2 ) 2 ) 2-4 —OH, —O(CH 2 ) 2-4 —OH, —O(CH 2 ) 2-4 —PO 3 H 2 ), —O(CH 2 ) 2-4 —COOH, —O(CH 2 ) 2-4 —CH(CH 3 ) 2 , C 2 -C 6 alkyl substituted with 1-3 substituents selected from —OH, —CH 3 , cyclopropyl, —O(CH 2 ) 2-4 —COOH, —O(CH 2 ) 2-4 (PO 3 H 2 ), —COOH, COOCH 3 , and —COOCH 2 CH 3 ,

and R A is —CH 3 .

15. The compound of claim 1 selected from 2-methylbenzo[f][1,7]naphthyridin-5-amine,

2-propylbenzo[f][1,7]naphthyridin-5-amine,

2-ethylbenzo[f][1,7]naphthyridin-5-amine,

2-(3-methoxyphenethyl)benzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-phenethylbenzo[f][1,7]naphthyridin-5-amine,

2-(2-methylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(3-methylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-methylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(2-(naphthalen-1-yl)ethyl)benzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(2-(naphthalen-2-yl)ethyl)benzo[f][1,7]naphthyridin-5-amine,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)benzoic acid,

3-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)benzoic acid,

2-(3-chlorophenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(2-chlorophenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

(3-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)methanol,

2-(4-chlorophenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-butylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-butylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-propylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(trifluoromethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(2,5-dimethylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-propylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(2,4,5-trimethylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(2,5-dimethylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-isopropylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-heptylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-isobutoxyphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-((2-methoxyethoxy)methoxy)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(2-phenoxyethoxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(4-phenylbutoxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(allyloxy)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(3-phenylpropoxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(heptan-4-yloxy)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(4-methylpent-3-enyloxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(2-cyclohexylethoxy)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-isopropoxyphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-(3,3-dimethylbutoxy)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-(2-cyclopropylethyl)-2-(4-(dimethylamino)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

8-(2-cyclopropylethyl)-2-(2,4-dimethylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

N-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)acetamide,

N-(4-(2-(5-aminobenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)acetamide,

N-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)-4-methylbenzenesulfonamide,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzonitrile,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-N-(2-aminoethyl)-3-methylbenzamide,

8-methyl-2-(2-methyl-4-(1H-tetrazol-5-yl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

methyl 2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzamido)-4-methylpentanoate,

methyl 2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzamido)acetate,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzamido)-4-methylpentanoic acid,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzamido)acetic acid,

6-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)hexan-1-ol,

7-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)heptanoic acid,

11-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)undecan-1-ol,

ethyl 2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)acetate,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)acetic acid,

3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)propanoic acid,

6-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)hexanoic acid,

8-methyl-2-(2-methyl-4-(methylthio)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(methylsulfonyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(hexyloxy)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-phenethoxyphenethyl)benzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(pentyloxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(4-methylpentyloxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(2-fluorophenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(3-fluorophenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-fluorophenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(2-(thiophen-3-yl)ethyl)benzo[f][1,7]naphthyridin-5-amine,

(5-aminobenzo[f][1,7]naphthyridin-2-yl)methanol,

2-(3,4-dimethylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(3,4-dimethylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(3,5-dimethylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(2-(benzofuran-5-yl)ethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(2-nitroethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(aminomethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

N 2 ,8-dimethylbenzo[f][1,7]naphthyridine-2,5-diamine,

2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)-1-phenylethanol,

2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)-1-(4-methoxyphenyl)ethanol,

2-(biphenyl-2-yl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(2-(2,6-dimethylpyridin-3-yl)ethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(2-(5-methoxypyridin-2-yl)ethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)propanoic acid,

6-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)pyridin-3-ol

8-methyl-2-(4-(trifluoromethoxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

(E)-3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)acrylic acid,

(E)-ethyl 3-(5-amino-2-(4-methoxy-2-methylphenethyl)benzo[f][1,7]naphthyridin-8-yl)acrylate,

(E)-8-(2-cyclopropylvinyl)-2-phenethylbenzo[f][1,7]naphthyridin-5-amine,

8-(2-cyclopropylethyl)-2-phenethylbenzo[f][1,7]naphthyridin-5-amine,

(5-amino-2-phenethylbenzo[f][1,7]naphthyridin-8-yl)methanol,

(5-amino-2-(4-methoxy-2-methylphenethyl)benzo[f][1,7]naphthyridin-8-yl)methanol,

3-(2-(5-aminobenzo[f][1,7]naphthyridin-2-yl)ethyl)phenol,

2-(2-methoxyphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-ethylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-ethylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-(dimethylamino)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(piperidin-1-yl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-tert-butylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(piperidin-1-yl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-methoxyphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(3,5-dimethoxyphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(2-(trifluoromethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)benzonitrile,

8-methyl-2-(4-(1-morpholinoethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-aminophenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(1-(phenethylamino)ethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)acetonitrile,

2-(4-(piperidin-1-ylmethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

1-(4-(2-(5-aminobenzo[f][1,7]naphthyridin-2-yl)ethyl)benzyl)piperidin-4-ol,

2-(4-(aminomethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-((ethylamino)methyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(2-aminopropan-2-yl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

1-(1-(4-(2-(5-aminobenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethyl)pyrrolidine-3-carboxylic acid,

8-methyl-2-(4-(1-(phenylamino)ethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-ethyl-8-methylbenzo[f][1,7]naphthyridin-5-amine,

(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)methanol,

8-methyl-2-propylbenzo[f][1,7]naphthyridin-5-amine,

2-(2-(1H-indol-5-yl)ethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-ethoxyphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-phenoxyphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(2,4-dimethylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(2,4-dimethylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-methoxy-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenol,

2-(2-(2,3-dihydrobenzofuran-5-yl)ethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethanol,

8-methylbenzo[f][1,7]naphthyridine-2,5-diamine,

1-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)propan-2-ol,

2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)acetonitrile,

N-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)acetamide,

2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)-1-(2,4-dimethylphenyl)ethanol,

2-(2-(6-methoxy-4-methylpyridin-3-yl)ethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

4-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)butan-1-ol,

methyl 3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)propanoate,

3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)propan-1-ol,

4-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)-2-methylbutan-2-ol,

2-(4-(aminomethyl)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

(E)-ethyl 3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)acrylate,

ethyl 3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)propanoate,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzyl)propane-1,3-diol,

3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)propanoic acid,

5-amino-2-(4-methoxy-2-methylphenethyl)benzo[f][1,7]naphthyridine-8-carbaldehyde,

ethyl 4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)benzoate,

8-methyl-2-(4-methylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)propan-2-ol,

(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)methanol,

ethyl 4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzoate,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzoic acid,

(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)methanol,

8-methyl-2-(2,4,6-trimethylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)propan-2-ol,

8-methyl-2-(4-propoxyphenethyl)benzo[f][1,7]naphthyridin-5-amine,

(E)-3-(5-amino-2-(4-methoxy-2-methylphenethyl)benzo[f][1,7]naphthyridin-8-yl)acrylic acid,

ethyl 3-(5-amino-2-(4-methoxy-2-methylphenethyl)benzo[f][1,7]naphthyridin-8-yl)propanoate,

3-(5-amino-2-(4-methoxy-2-methylphenethyl)benzo[f][1,7]naphthyridin-8-yl)propanoic acid,

3-(5-amino-2-(4-methoxy-2-methylphenethyl)benzo[f][1,7]naphthyridin-8-yl)propan-1-ol,

8-(methoxymethyl)benzo[f][1,7]naphthyridin-5-amine,

(5-amino-2-(4-methoxyphenethyl)benzo[f][1,7]naphthyridin-8-yl)methanol,

8-phenethylbenzo[f][1,7]naphthyridin-5-amine,

(5-amino-2-(4-bromophenethyl)benzo[f][1,7]naphthyridin-8-yl)methanol,

2-(4-methoxy-2-methylphenethyl)-8-pentylbenzo[f][1,7]naphthyridin-5-amine,

8-(2-cyclopropylethyl)-2-(4-methoxy-2-methylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

(5-amino-2-(2,4,6-trimethylphenethyl)benzo[f][1,7]naphthyridin-8-yl)methanol,

(5-amino-2-(4-propoxyphenethyl)benzo[f][1,7]naphthyridin-8-yl)methanol,

(2-(2-(1H-indol-5-yl)ethyl)-5-aminobenzo[f][1,7]naphthyridin-8-yl)methanol,

methyl 4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzoate,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-N,3-dimethylbenzamide,

N-(2-acetamidoethyl)-4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzamide,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-N-(2-(dimethylamino)ethyl)-N,3-dimethylbenzamide,

2-(4-methoxyphenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-methoxy-2-methylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzamide,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-N,N,3-trimethylbenzamide,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-N-(2-hydroxyethyl)-3-methylbenzamide,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-N-(2-(dimethylamino)ethyl)-3-methylbenzamide,

(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)(pyrrolidin-1-yl)methanone,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-N-(2-(diethylamino)ethyl)-3-methylbenzamide,

(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)(4-ethylpiperazin-1-yl)methanone,

(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)(piperazin-1-yl)methanone,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methyl-N-(2-(pyrrolidin-1-yl)ethyl)benzamide,

4-(2-(5-aminobenzo[f][1,7]naphthyridin-2-yl)ethyl)-N-(2-(dimethylamino)ethyl)-N,3-dimethylbenzamide,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-N-(2-(dimethylamino)ethyl)-N-methylbenzamide,

2-(4-(2-(5-aminobenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)propan-2-ol,

2-(4-butoxyphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(2-(biphenyl-4-yl)ethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-((1,3-dihydroisobenzofuran-1-yl)methyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(2-methylallyloxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(isopentyloxy)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl propyl carbonate,

ethyl 5-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)pentanoate,

2-(4-(cyclopentyloxy)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-(cyclobutylmethoxy)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

8-methyl-2-(4-(2-morpholinoethoxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)-1-phenylethanone,

5-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)pentanoic acid,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)ethanol,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)-N,N-dimethylacetamide,

8-methyl-2-(2-methyl-4-(2-morpholinoethoxy)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)ethoxy)ethanol,

diethyl 3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)propylphosphonate,

3-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)propylphosphonic acid,

2-(4-butoxy-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-(2-(5-aminobenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)ethanol,

2-(2-(4-(2-(5-aminobenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)ethoxy)ethanol,

ethyl 5-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)pentanoate,

5-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)pentanoic acid,

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)ethanol,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl ethyl carbonate,

methyl 4-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)butanoate,

4-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)butanoic acid,

4-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)butanoic acid,

2-(4-(isopentyloxy)-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl hexyl carbonate,

2-(2,4,6-trimethylphenethyl)benzo[f][1,7]naphthyridin-5-amine,

(5-amino-2-(2,4-dimethylphenethyl)benzo[f][1,7]naphthyridin-8-yl)methanol,

diethyl 3-(2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)ethoxy)propylphosphonate,

diethyl 3-(2-(2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)ethoxy)ethoxy)propylphosphonate,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl dimethylsulfamate,

(5-amino-2-(4-(dimethylamino)phenethyl)benzo[f][1,7]naphthyridin-8-yl)methanol,

2-(4-(dimethylamino)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenol,

1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethanone,

2-(4-((dimethylamino)methyl)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-(1-(dimethylamino)ethyl)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethanone oxime,

8-methyl-2-(4-((methylamino)methyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)benzylamino)ethanol,

8-methyl-2-(4-(pyrrolidin-1-ylmethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

2-(3,4-dimethoxyphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethylamino)ethanol,

1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethanol,

8-methyl-2-(4-(oxazol-5-yl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

3-(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethylamino)propanenitrile,

(2R)-2-(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethylamino)propan-1-ol,

8-methyl-2-(4-(1-(piperazin-1-yl)ethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

((2S)-1-(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethyl)pyrrolidin-2-yl)methanol,

N 1 -(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethyl)-N 2 ,N 2 -dimethylethane-1,2-diamine,

3-(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethylamino)propanoic acid,

8-methyl-2-(4-(1-(4-methylpiperazin-1-yl)ethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

N 2 -(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethyl)-N 1 ,N 1 -dimethylpropane-1,2-diamine,

8-methyl-2-(4-(1-(2-(pyridin-4-yl)ethylamino)ethyl)phenethyl)benzo[f][1,7]naphthyridin-5-amine,

N 1 -(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethyl)-N 2 ,N 2 -diethylethane-1,2-diamine,

2-(4-(dimethylamino)-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

1-(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethyl)pyrrolidine-3-carboxylic acid,

4-(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethylamino)phenol,

1-(1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2yl)ethyl)phenyl)ethyl) pyrrolidin-3-ol, and

2-(4-(2-aminopropan-2-yl)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine.

16. A pharmaceutical composition comprising a therapeutically effective amount of a compound of Formula (I-A) of claim 1 and a pharmaceutically acceptable carrier.

17. A method for activating a TLR7 receptor, comprising administering to a system or a subject in need thereof, a therapeutically effective amount of a compound of Formula (I-A) of claim 1 , or pharmaceutically acceptable salts or pharmaceutical compositions thereof, thereby activating the TLR7 receptor.

18. A pharmaceutical composition comprising a compound of Formula (I-A) of claim 1 , an antigen and a pharmaceutically acceptable carrier, wherein the pharmaceutical composition is an immunogenic composition and the a compound of Formula (I-A) is an immune potentiator.

19. A method for enhancing the effectiveness of an immunogenic composition, comprising adding an effective amount of a compound of Formula (I-A) of claim 1 to the immunogenic composition.

20. An immunogenic composition comprising a compound of Formula (I-A) of claim 1 , and an antigen, wherein the amount of the compound is an amount effective to enhance an immune response to the antigen in a subject to whom the composition is administered.

21. The compound of claim 10 , wherein the compound is substituted with one to three R 13 groups independently selected from -LR 10 , -LOR 10 , -LR 8 , -LOR 8 , -LSR 8 , -LC(O)R 8 , -LC(O)OR 8 , -LC(O)R 10 , -LOC(O)OR 8 , -LN(R 9 ) 2 , -LNR 9 R 10 , -LC(O)N(R 9 ) 2 , -LS(O) 2 R 8 , —OLS(O) 2 N(R 9 ) 2 , -LC(O)NR 9 LN(R 9 ) 2 and -LP(O)(OR 8 ) 2 .

22. The compound of claim 21 , wherein,

R 10 is a phenyl or a heteroaryl, wherein the phenyl is optionally substituted with halogen, —R 8 , —OR 8 or —N(R 9 ) 2 .

23. The compound of claim 11 , wherein,

each R A is independently selected from —R 8 , CO 2 R 8 , —(CH 2 ) n CO 2 R 8 and —C(O)R 8 .

24. The compound of claim 9 , wherein,

R A is —R 8 or (CH 2 ) n CO 2 R 8 ;

each R 13 is independently selected from -LR 8 , -LOR 8 , and -LP(O)(OR 8 ) 2 ,

L is a bond or —(O(CH 2 ) m ) t ;

each m is independently selected from 1, 2 or 3;

n is 1, 2 or 3, and

t is 1, 2, 3, or 4.

25. The compound of claim 24 , wherein,

R 8 is H or C 1 -C 6 alkyl.

26. The compound of claim 14 selected from:

2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenyl)propan-2-ol;

2-(4-methoxy-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine;

2-(2,4-dimethylphenethyl)benzo[f][1,7]naphthyridin-5-amine;

ethyl 4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylbenzoate;

2-(4-(dimethylamino)phenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine,

2-(4-(isopentyloxy)-2-methylphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine;

2-(2-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)-3-methylphenoxy)ethoxy)ethanol and

2-(4-methoxyphenethyl)-8-methylbenzo[f][1,7]naphthyridin-5-amine.