Substituted heteroaryl pyridopyrimidone derivatives

1. A compound of formula (I) or a salt thereof:

wherein:

Y represents a sulfur atom or an oxygen atom;

Z represents a bond;

R1 represents a 2, 3 or 4-pyridine ring or a 2, 4 or 5-pyrimidine ring, the ring being optionally substituted by a C 1-6 alkyl group, a C 1-6 alkoxy group or a halogen atom;

R2 represents a 4-15 membered heterocyclic group, which is being optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group, a halogen atom, a C 1-2 perhalogenated alkyl group, a C 1-6 halogenated alkyl group, a hydroxyl group, a C 1-6 alkoxy group, a C 1-2 perhalogenated alkoxy group, a C 1-6 halogenated alkoxy group, a nitro, a cyano, an amino, a C 1-6 monoalkylamino group, a C 2-12 dialkylamino group, a S—(C 1-6 -alkyl) group, an 4-15 membered heterocyclic group, an aryl group, a O-aryl group and a S-aryl group, the above-mentioned groups being optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group, a halogen atom, a (C 1-6 ) alkoxy group, a C(O)O(C 1-6 -alkyl) and a C(O)O(aryl) group;

R3 represents a hydrogen atom, a C 1-6 alkyl group or a halogen atom;

R4 and R5 represent, each independently, a hydrogen atom, a C 1-6 alkyl group, optionally substituted by 1 to 4 substituents selected from a halogen atom, a phenyl group, a hydroxyl group and a C 1-6 alkoxy group;

R6 represents a hydrogen atom, a C 1-6 alkyl group optionally substituted by a halogen atom or a cycloalkyl group, or a halogen atom;

R7 represents a hydrogen atom or a C 1-6 alkyl group;

n represents 0; m represents 0 to 1; and o represents 0 to 2.

2. The compound according to claim 1 , wherein R1 represents an unsubstituted 4-pyridine ring or unsubstituted 4-pyrimidine ring.

3. The compound according to claim 1 , wherein R2 represents a benzotriazole group, quinoxaline group, benzodioxepine group, benzodioxane group, benzodioxine group, benzodioxole group, indole group, pyridine group, pyrindine group, quinoline group, pyridazine group, isoquinoline group, pyrimidine group, naphthyridine group, imidazopyridine group, cinnoline group or benzofuran group and wherein the above-mentioned groups are being optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group, a halogen atom, a C 1-6 alkoxy group, a C 1-2 perhalogenated alkoxy group, an amino, a S—C 1-6 -alkyl group, a furan group, a thiophene group, a [1,4]diazepane, a phenyl group, a O-phenyl group and a S-phenyl group, the above -mentioned groups being optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group, a halogen atom, a C 1-6 alkoxy group, and a C(O)O C 1-6 -alkyl.

4. The compound according to claim 1 , wherein R4 and R5 represent a hydrogen atom;

(m+o) represents 2 or 3;

R2 represents a benzotriazole group, quinoxaline group, benzodioxepine group, benzodioxane group, benzodioxine group, benzodioxole group, indole group, pyridine group, pyrindine group, quinoline group, pyridazine group, isoquinoline group, pyrimidine group, naphthyridine group, imidazopyridine group, cinnoline group or benzofuran group and wherein the above-mentioned groups are being optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group, a halogen atom, a C 1-6 alkoxy group, a C 1-2 perhalogenated alkoxy group, an amino, a S—C 1-6 -alkyl group, a furan group, a thiophene group, a [1,4]diazepane, a phenyl group, a O-phenyl group and a S-phenyl group, and wherein the above-mentioned groups are being optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group, a halogen atom, a C 1-6 alkoxy group, and a C(O)O C 1 -6 -alkyl;

R6 represents a hydrogen atom, a methyl or an ethyl group;

n represents 0;

Z represents a bond, and

Y represents an oxygen atom.

5. The compound according to claim 1 which is selected from the group consisting of:

(+/−)2,2-Dimethyl-2,3-dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)1-Methyl-1H-benzotriazole-5-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)Quinoxaline-6-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)2,3-Dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)2,2-Difluoro-benzo[1,3]dioxole-4-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)3,4-Dihydro-2H-benzo[b][1,4]dioxepine-6-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)Benzofuran-2-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)2,2-Dimethyl-2,3-dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)8-Amino-7-chloro-2,3-dihydro-benzo[1,4]dioxine-5-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)6-Fluoro-4H-benzo[1,3]dioxine-8-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)6-Fluoro-4H-benzo[1,3]dioxine-8-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)2,3-Dihydro-benzofuran-5-carboxylic acid (4-oxo-2-pyridin -4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)8-Amino-7-chloro-2,3-dihydro-benzo[1,4]dioxine-5-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)1-Methyl-1H-indole-3-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)2-Methoxy-N-(4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)6,7-Dihydro-5H-[1]pyrindine-6-carboxylic acid (4-oxo-2-pyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)2-Methoxy-N-(4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)2,6-Dimethoxy-N-(4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)N-(4-Oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H -pyrido[1,2-a]pyrimidin-9-yl)-6-(2,2,2-trifluoro-ethoxy)-nicotinamide;

(+/−)2-Fluoro-N-(4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)N-(4-Oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H -pyrido[1,2-a]pyrimidin-9-yl)-2-p-tolyloxy-nicotinamide;

(+/−)2-(4-Chloro-phenoxy)-N-(4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)2-Methylsulfanyl-N-(4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)5-Furan-2-yl-N-(4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)5-(2-Methoxy-phenyl)-N-(4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)5-(3,4-Dimethoxy-phenyl)-N-(4-oxo-2-pyrimidin-4-yl -6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)Quinoline-3-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)N-(4-Oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H -pyrido[1,2-a]pyrimidin-9-yl)-6-thiophen-2-yl-nicotinamide;

(+/−)4-[5-(4-Oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-ylcarbamoyl)-pyridin-2-yl]-[1,4]diazepane-1-carboxylic acid tert-butyl ester;

(+/−)6-Methyl-N-(4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)N-(4-Oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H -pyrido[1,2-a]pyrimidin-9-yl)-2-propylsulfanyl-nicotinamide;

(+/−)N-(4-Oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H -pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)6-Chloro-N-(4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)2-Methoxy-N-(9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)4-Methoxy-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)3,6-Dimethoxy-pyridazine-4-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)Pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)6-Methoxy-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)4-Methoxy-quinoline-2-carboxylic acid (4-oxo-2-pyrimidin -4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)Isoquinoline-1-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)5-Chloro-2-methylsulfanyl-pyrimidine-4-carboxylic acid (9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)[1,6]Naphthyridine-5-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)6-Chloro-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)[1,5]Naphthyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)6-(2,6-Dimethoxy-phenyl)-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)6-(2-Fluoro-phenyl)-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)8-Amino-7-chloro-2,3-dihydro-benzo[1,4]dioxine-5-carboxylic acid (9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)3,6-Dimethoxy-pyridazine-4-carboxylic acid (9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)2,2-Dimethyl-2,3-dihydro-benzofuran-7-carboxylic acid (9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)6-Fluoro-4H-benzo[1,3]dioxine-8-carboxylic acid (9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)[1,5]Naphthyridine-2-carboxylic acid (9-methyl-4-oxo -2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)2,3-Dihydro-benzofuran-7-carboxylic acid (9-methyl-4-oxo -2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)Pyridine-2-carboxylic acid (9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)6-Chloro-pyridine-2-carboxylic acid (9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)[1,6]Naphthyridine-5-carboxylic acid (9-methyl-4-oxo -2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)N-(9-Methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+/−)5-Bromo-benzofuran-2-carboxylic acid (9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+)6-(2-Fluoro-phenyl)-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(−)6-(2-Fluoro-phenyl)-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+)2-Methoxy-N-(9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(−)2-Methoxy-N-(9-methyl-4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-nicotinamide;

(+)[1,5]Naphthyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(−)[1,5]Naphthyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-9-yl)-amide;

(+/−)2,2-Dimethyl-2,3-dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)1-Methyl-1H-benzotriazole-5-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)8-Amino-7-chloro-2,3-dihydro-benzo[1,4]dioxine-5-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)6-Fluoro-4H-benzo[1,3]dioxine-8-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)Quinoxaline-6-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)2,3-Dihydro-benzofuran-5-carboxylic acid (4-oxo-2-pyridin -4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)1-Methyl-1H-indole-3-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)5-Bromo-2,3-dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)-2,3-Dihydro-benzofuran-2-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)6,7-Dihydro-5H-[1]pyrindine-6-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)Benzofuran-2-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)[1,5]Naphthyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)2-Methoxy-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-nicotinamide;

(+/−)5-Chloro-2-methylsulfanyl-pyrimidine-4-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)Isoquinoline-1-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)2-Methoxy-N-(4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-nicotinamide;

(+/−)5-Chloro-2-methylsulfanyl-pyrimidine-4-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)Isoquinoline-1-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)Pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)6-Chloro-pyridine-2-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)[1,5]Naphthyridine-2-carboxylic acid (4-oxo-2-pyridin -4-yl-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-8-yl)-amide;

(+/−)8-Amino-7-chloro-2,3-dihydro-benzo[1,4]dioxine-5-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl) -amide;

(+/−)2-Methoxy-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-0-yl)-nicotinamide;

(+/−)5-Bromo-2,3-dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-Fluoro-4H-benzo[1,3]dioxine-8-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)5-Chloro-2,3-dihydro-benzofuran-7-carboxylic acid (4-oxo -2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)2,3-Dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)2,2-Dimethyl-2,3-dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)2,2-Dimethyl-2,3-dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-Fluoro-4H-benzo[1,3]dioxine-8-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)5-Chloro-2,3-dihydro-benzofuran-7-carboxylic acid (4-oxo -2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)2,3-Dihydro-benzofuran-7-carboxylic acid (4-oxo-2-pyridin -4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)8-Amino-7-chloro-2,3-dihydro-benzo[1,4]dioxine-5-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl) -amide;

(+/−)2-Methoxy-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+)2-Methoxy-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(−)2-Methoxy-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)2,6-Dimethoxy-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)N-(4-Oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-6-(2,2,2-trifluoro-ethoxy)-nicotinamide;

(+/−)2-Fluoro-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)2-Methylsulfanyl-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)N-(4-Oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-2-p-tolyloxy-nicotinamide;

(+/−)2-(4-Chloro-phenoxy)-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)3H-Imidazo[4,5-b]pyridine-6-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)N-(4-Oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-6-thiophen-2-yl-nicotinamide;

(+/−)6-Methyl-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)5-Furan-2-yl-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)5-(2-Methoxy-phenyl)-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)5-(3,4-Dimethoxy-phenyl)-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)Quinoline-3-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)4-[5-(4-Oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-ylcarbamoyl)-pyridin-2-yl]-[1,4]diazepane-1-carboxylic acid tert-butyl ester;

(+/−)5-(4-Bromo-phenyl)-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)N-(4-Oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-1 0-yl)-nicotinamide;

(+/−)6-Chloro-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)2-Chloro-N-(4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)N-(4-Oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-2-phenylsulfanyl-nicotinamide

(+/−)N-(4-Oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-2-propylsulfanyl-nicotinamide;

(+/−)2-(4-Chloro-phenylsulfanyl)-N-(4-oxo-2-pyridin-4-yl -4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)4-Methyl-2-phenyl-pyrimidine-5-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)Pyrimidine-5-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)5-Chloro-2-methylsulfanyl-pyrimidine-4-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)Pyridazine-4-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-Phenyl-pyrimidine-4-carboxylic acid (4-oxo-2-pyrimidin -4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)Cinnoline-4-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)3,6-Dimethoxy-pyridazine-4-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)Isoquinoline-1-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)3-Phenyl-cinnoline-4-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)[1,6]Naphthyridine-5-carboxylic acid (4-oxo-2-pyridin -4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)[1,5]Naphthyridine-2-carboxylic acid (4-oxo-2-pyridin -4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)[1,6]Naphthyridine-5-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)[1,5]Naphthyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)4-Methoxy-quinoline-2-carboxylic acid (4-oxo-2-pyrimidin -4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)Isoquinoline-1-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)Pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-Chloro-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)4-Methoxy-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)3,5-Difluoro-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-(2,6-Dimethoxy-phenyl)-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)4-Methyl-2-phenyl-pyrimidine-5-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)3-Phenyl-cinnoline-4-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)3,6-Dimethoxy-pyridazine-4-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)2-Methyl-4-phenyl-pyrimidine-5-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-Phenyl-pyrimidine-4-carboxylic acid (4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-(2-Fluoro-phenyl)-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)2,6-Dimethoxy-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)N-(4-Oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro -pyrimido[1,2-a]azepin-10-yl)-6-(2,2,2-trifluoro-ethoxy)-nicotinamide;

(+/−)2-Fluoro-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)5-Furan-2-yl-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)6-Methoxy-pyridine-2-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)Quinoline-3-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)4-[5-(4-Oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-ylcarbamoyl)-pyridin-2-yl]-[1,4]diazepane-1-carboxylic acid tert-butyl ester;

(+/−)5-(2-Methoxy-phenyl)-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)5-(3,4-Dimethoxy-phenyl)-N-(4-oxo-2-pyrimidin-4-yl -4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)2,6-Dimethoxy-pyrimidine-4-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)5-Bromo-2-methylsulfanyl-pyrimidine-4-carboxylic acid (4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)[1,5]Naphthyridine-2-carboxylic acid (10-methyl-4-oxo -2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-Methoxy-pyridine-2-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)5-Bromo-2,3-dihydro-benzofuran-7-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)N-(10-Ethyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-2-methoxy-nicotinamide;

(+/−)2-Methoxy-N-(10-methyl-4-oxo-2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)2,3-Dihydro-benzofuran-7-carboxylic acid (10-methyl-4-oxo -2-pyridin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)2-Methoxy-N-(10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)2,3-Dihydro-benzofuran-7-carboxylic acid (10-methyl-4-oxo -2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-Fluoro-4H-benzo[1,3]dioxine-8-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)2,6-Dimethoxy-N-(10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+/−)Pyridine-2-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)4-Methoxy-pyridine-2-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)3,6-Dimethoxy-pyridazine-4-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-Chloro-pyridine-2-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)8-Amino-7-chloro-2,3-dihydro-benzo[1,4]dioxine-5-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-0-yl)-amide;

(+/−)5-Bromo-2-methylsulfanyl-pyrimidine-4-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl) -amide;

(+/−)6-Bromo-pyridine-2-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)3,5-Difluoro-pyridine-2-carboxylic acid (10-methyl-4-oxo -2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)2,2-Dimethyl-2,3-dihydro-benzofuran-7-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl) -amide;

(+/−)4-Methoxy-pyridine-2-carboxylic acid (10-ethyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)5-Chloro-2,3-dihydro-benzofuran-7-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)5-Chloro-2-methylsulfanyl-pyrimidine-4-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl) -amide;

(+/−)8-Amino-7-chloro-2,3-dihydro-benzo[1,4]dioxine-5-carboxylic acid (10-ethyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)3,6-Dimethoxy-pyridazine-4-carboxylic acid (10-ethyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)6-Fluoro-4H-benzo[1,3]dioxine-8-carboxylic acid (10-ethyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+/−)N-(10-Ethyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-2,6-dimethoxy-nicotinamide;

(+/−)N-(3-Bromo-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-2-methoxy-nicotinamide;

(+/−)6-Chloro-pyridine-2-carboxylic acid (10-ethyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

(+)2,6-Dimethoxy-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(−)2,6-Dimethoxy-N-(4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+)2-Methoxy-N-(10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(−)2,6-Dimethoxy-N-(10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(−)2-Methoxy-N-(10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(+)2,6-Dimethoxy-N-(10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-nicotinamide;

(−)5-Bromo-2,3-dihydro-benzofuran-7-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide; and

(+)5-Bromo-2,3-dihydro-benzofuran-7-carboxylic acid (10-methyl-4-oxo-2-pyrimidin-4-yl-4,6,7,8,9,10-hexahydro-pyrimido[1,2-a]azepin-10-yl)-amide;

or a salt thereof.

6. A pharmaceutical composition comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof according to claim 1 in combination with at least one pharmaceutically acceptable excipient.

7. A pharmaceutical composition comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof according to claim 2 in combination with at least one pharmaceutically acceptable excipient.

8. A pharmaceutical composition comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof according to claim 3 in combination with at least one pharmaceutically acceptable excipient.

9. A pharmaceutical composition comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof according to claim 4 in combination with at least one pharmaceutically acceptable excipient.

10. A pharmaceutical composition comprising a compound of formula (I) or a pharmaceutically acceptable salt thereof according to claim 5 in combination with at least one pharmaceutically acceptable excipient.