Inhibitors of the renal outer medullary potassium channel
View Patent ↗The present invention provides compounds of Formula I and the pharmaceutically acceptable salts thereof, which are inhibitors of the ROMK (Kir1.1) channel. The compounds act as diuretics and natriuretics and are valuable pharmaceutically active compounds for the therapy and prophylaxis of medical conditions including cardiovascular diseases such as hypertension and conditions resulting from excessive salt and water retention.
1. A compound having structural Formula I:
or a pharmaceutically acceptable salt thereof wherein:
X is O;
R 1 is —C(R 9 )(R 10 )— or —N(R 13 )—;
m is an integer selected from 1 or 2;
X 1 , X 2 and X 3 are each independently selected from C(R 7 ) or N, provided that at least one of X 1 , X 2 and X 3 must be N and at most two of X 1 X 2 and X 3 are N;
Z is
R 2 is —H, —F, —Cl, —C 1-6 alkyl, —C 3-6 cycloalkyl or —OC 1-6 alkyl;
R 3 and R 3a are each independently —H, —F, —Cl, —CN, —C 1-6 alkyl, —C 3-6 cycloalkyl or —OC 1-6 alkyl;
R 4 and R 4a are each independently —F, —Cl, —CN, —C 1-6 alkyl, —C 3-6 cycloalkyl, —OC 1-4 alkyl or N-tetrazolyl;
or R 3 and R 4 are joined together with the carbon atoms in the phenyl ring to which they are attached to form:
wherein R is —H or —C 1-4 alkyl;
R 5 and R 5a are each independently —H, —F, —Cl, —CN, —C 1-4 alkyl, —C 3-6 cycloalkyl or —OC 1-4 alkyl;
provided that when R 3 and R 4 are not joined together, then one and only one of R 3 , R 4 or R 5 is —CN;
and provided that one and only one of R 3a , R 4a or R 5a is —CN;
R 6 is —H or —C 1-4 alkyl;
each R 7 is independently —H, —F, —Cl, —CF 3 , —C 1-4 alkyl or —OC 1-4 alkyl;
R 8 is —H, —F, —Cl, —CF 3 , —C 1-4 alkyl or —OC 1-4 alkyl;
R 9 is —H, —F or —C 1-4 alkyl;
R 10 is —H or —F;
R 11 is —H or —CH 3 ;
R 12 is —H or —CH 3 ; and
R 13 is —H or —C 1-4 alkyl.
2. The compound of claim 1 wherein Z is
and one of R 3 and R 4 is —CN, or a pharmaceutically acceptable salt thereof.
3. The compound of claim 1 wherein Z is
or a pharmaceutically acceptable salt thereof.
4. The compound of claim 1 wherein Z is
or a pharmaceutically acceptable salt thereof.
5. The compound of claim 1 or a pharmaceutically acceptable salt thereof wherein R 1 is —C(R 9 )(R 10 )—.
6. The compound of claim 1 or a pharmaceutically acceptable salt thereof wherein
7. The compound of claim 1 or a pharmaceutically acceptable salt thereof wherein m is 1, R 6 is —H, R 11 is —H and R 12 is —H.
8. The compound of claim 2 having structural Formula IV
or a pharmaceutically acceptable salt thereof wherein:
X is O,
X 1 , X 2 and X 3 are each independently selected from C(R 7 ) or N, provided that at least one of X 1 , X 2 and X 3 must be N and at most two of X 1 X 2 and X 3 are N;
Z is
R is —H or —C 1-3 alkyl; R 2 is —H, —F, —Cl, —C 1-3 alkyl, cyclopropyl or —OC 1-3 alkyl;
R 3 is —H, —F, —Cl, —CN, —C 1-3 alkyl, cyclopropyl or —OC 1-3 alkyl; R 5 is —H, —F, —Cl, —CN, —C 1-3 alkyl, cyclopropyl or —OC 1-3 alkyl; R 7 is —H, —CH 3 , —CH 2 CH 3 , —OCH 3 , —F, —Cl, or —CF 3 ; and
R 8 is —H, —CH 3 or —OCH 3 .
9. The compound of claim 1 which is:
6-((3R,9aS)-8-{[4-(1H-tetrazol-1-yl)phenyl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-3,4-dihydro-1H-isochromen-1-one;
3-((3R,9aS)-8-(2-(5-(1H-tetrazol-1-yl)pyridin-2-yl)acetyl)octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-6-fluoro-2-methylbenzonitrile;
3-((3S,9aS)-8-(2-(5-(1H-tetrazol-1-yl)pyridin-2-yl)acetyl)octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-6-fluoro-2-methylbenzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
(3S)-3-methyl-6-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
(3R)-3-methyl-6-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one; 6-methoxy-2-methyl-3-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
4-fluoro-2-methoxy-5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methoxy-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[4-methyl-2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile; or
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-a]pyrazin-3-yl]benzonitrile;
or a pharmaceutically acceptable salt thereof.
10. The compound of claim 1 which is;
3-((3R,9aS)-8-(2-(5-(1H-tetrazol-1-yl)pyridin-2-yl)acetyl)octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-6-fluoro-2-methylbenzonitrile;
3-((3S,9aS)-8-(2-(5-(1H-tetrazol-1-yl)pyridin-2-yl)acetyl)octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-6-fluoro-2-methylbenzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
(3S)-3-methyl-6-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
(3R)-3-methyl-6-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
or a pharmaceutically acceptable salt thereof.
11. A pharmaceutical composition comprised of a compound of claim 1 and a pharmaceutically acceptable carrier.
12. A pharmaceutical composition comprised of a compound of claim 10 and a pharmaceutically acceptable carrier.
13. The pharmaceutical composition of claim 11 further comprising an additional active agent selected from losartan, valsartan, candesartan cilexetil, olmesartan medoximil, telmesartan, eprosartan mesylate, irbesartan, azilsartan medoxomil, amlodipine, alacepril, benazepril, captopril, ceronapril, cilazapril, delapril, enalapril, enalaprilat, fosinopril, imidapril, lisinopril, moveltipril, perindopril, quinapril, ramipril, spirapril, temocapril, or trandolapril, amiloride, spironolactone, epleranone or triamterene, or a pharmaceutically acceptable salt thereof, and optionally hydrochlorothiazide.
14. A method for causing diueresis, natriuresis or both, comprising administering a compound of claim 1 in a therapeutically effective amount to a patient in need thereof.
15. A method for the treatment of hypertension comprising administering a compound of claim 1 in a therapeutically effective amount to a patient in need thereof.
16. A method for the treatment of heart failure comprising administering a compound of claim 1 in a therapeutically effective amount to a patient in need thereof.
17. A method for the treatment of one or more disorders selected from hypertension, acute heart failure, chronic heart failure or pulmonary arterial hypertension, comprising administering a compound of claim 1 in a therapeutically effective amount as appropriate, to a patient in need thereof.
18. The compound of claim 1 which is:
6-((3R,9aS)-8-{[4-(1H-tetrazol-1-yl)phenyl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-3,4-dihydro-1H-isochromen-1-one;
3-((3R,9aS)-8-(2-(5-(1H-tetrazol-1-yl)pyridin-2-yl)acetyl)octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-6-fluoro-2-methylbenzonitrile;
3-((3S,9aS)-8-(2-(5-(1H-tetrazol-1-yl)pyridin-2-yl)acetyl)octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-6-fluoro-2-methylbenzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-chloro-6-fluoro-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-3-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
4-methyl-5-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
4-methyl-5-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
2-methyl-3-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methyl-3-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
(3r)-3-methyl-6-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
(3S)-3-methyl-6-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
4-methyl-5-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
4-methyl-5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
4-methyl-5-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
4-methyl-5-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
5-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
5-[(3R,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
5-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
4-methyl-5-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
6-[(3R,9aS)-8-{[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
(3S)-3-methyl-6-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
(3S)-3-methyl-6-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
(3S)-3-methyl-6-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
(3R)-3-methyl-6-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
2-fluoro-5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-5-[(3R,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methoxy-4-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methoxy-4-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methoxy-4-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
4-methyl-5-[(3S,9aS)-8-{[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-[(3R,9aS)-8-{[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
2-methoxy-4-[(3R,9aR)-8-{[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
4-chloro-5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
4-chloro-5-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
4-bromo-5-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
6-methoxy-2-methyl-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-methoxy-2-methyl-3-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-chloro-6-fluoro-3-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-chloro-6-fluoro-3-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-chloro-6-fluoro-3-[(3R,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-3-[(3R,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
2-methoxy-4-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
4-fluoro-2-methoxy-5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methoxy-3-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methoxy-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methoxy-3-[(3R,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methoxy-3-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-chloro-2-methyl-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-chloro-2-methyl-3-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-4-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-4-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
3-methyl-4-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]thiophene-2-carbonitrile;
3-methyl-4-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]thiophene-2-carbonitrile;
3-methyl-4-[(3R,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]thiophene-2-carbonitrile;
3-methyl-4-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]thiophene-2-carbonitrile;
6-methyl-5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
6-methyl-5-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
4-methyl-5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]pyridine-3-carbonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[5-(1H-tetrazol-1-yl)pyrazin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyrazin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{2-[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]propanoyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-[(3R,9aS)-8-{[5-(1H-tetrazol-1-yl)pyrazin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
2,4-difluoro-5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,4-difluoro-5-[(3R,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
4-methyl-5-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyrazin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[3-methyl-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[3-methyl-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-3-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-3-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-3-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-3-[(3S,9aS)-8-{[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methyl-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methyl-3-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methyl-3-[(3S,9aS)-8-{[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methoxy-4-[(3S,9aS)-8-{[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-chloro-6-fluoro-3-[(3R,9aS)-8-{[2-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyridin-4-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)pyridin-4-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
(3R,9aS)-3-[3-(1H-tetrazol-1-yl)phenyl]-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazine;
(3R,9aS)-3-[2-methyl-3-(1H-tetrazol-1-yl)phenyl]-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazine;
(3R)-3-methyl-6-[(3R,9aS)-3-methyl-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
(3S)-3-methyl-6-[(3R,9aS)-3-methyl-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
2,6-difluoro-4-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-4-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-4-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-4-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-6-methoxy-4-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-6-methoxy-4-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-6-methoxy-4-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-6-methoxy-4-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2,6-difluoro-4-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methyl-3-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methyl-3-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[4-methyl-2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[4-methyl-2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[4-methyl-2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[4-methyl-2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
4-methyl-5-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
4-methyl-5-[(3R,9aR)-8-{[5-(1H-tetrazol-1-yl)pyrazin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-benzofuran-1(3H)-one;
6-fluoro-3-[(3R,9aR)-8-{[3-methoxy-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-methylbenzonitrile;
2-chloro-6-fluoro-3-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-chloro-6-fluoro-3-[(3S,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[6-methyl-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[6-methyl-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[4-methyl-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[4-methyl-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[6-methyl-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[6-methyl-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[5-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[5-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-methoxy-2-methyl-3-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-chloro-6-fluoro-3-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-chloro-6-fluoro-3-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-chloro-6-fluoro-3-[(3R,9aR)-8-{[4-methyl-2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methoxy-3-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methoxy-3-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-5-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-5-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methoxy-4-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-methoxy-4-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
6-fluoro-3-[(3R,9aR)-8-{[5-fluoro-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-methylbenzonitrile;
6-fluoro-3-[(3S,9aR)-8-{[5-fluoro-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-methylbenzonitrile;
6-fluoro-3-[(3R,9aS)-8-{[5-fluoro-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-methylbenzonitrile;
6-fluoro-3-[(3S,9aS)-8-{[5-fluoro-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-2-methylbenzonitrile;
3-[(3S,9aS)-8-{[4,6-dimethyl-2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-6-fluoro-2-methylbenzonitrile;
3-[(3S,9aR)-8-{[4,6-dimethyl-2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-6-fluoro-2-methylbenzonitrile;
3-[(3R,9aR)-8-{[4,6-dimethyl-2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-6-fluoro-2-methylbenzonitrile;
3-[(3S,9aS)-8-{[3-chloro-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-6-fluoro-2-methylbenzonitrile;
3-[(3R,9aR)-8-{[3-chloro-5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-6-fluoro-2-methylbenzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridazin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridazin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
3-[(3R,9aR)-8-{[4-ethyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]-6-fluoro-2-methylbenzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[2-(1H-tetrazol-1-yl)-4-(trifluoromethyl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)-4-(trifluoromethyl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aS)-8-{[5-(5-methyl-1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
4-methyl-5-(2-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-d][1,4]oxazepin-7-yl)-2-benzofuran-1(3H)-one;
4-methyl-5-(2-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-d][1,4]oxazepin-7-yl)-2-benzofuran-1(3H)-one;
4-methyl-5-(2-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydro-2H-pyrazino[1,2-d][1,4]oxazepin-7-yl)-2-benzofuran-1(3H)-one;
4-methyl-5-[(3R,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]thiazin-3-yl]-2-benzofuran-1(3H)-one;
4-methyl-5-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]thiazin-3-yl]-2-benzofuran-1(3H)-one;
4-fluoro-2-methoxy-5-[(3R,9aS)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(7S,10aR)-2-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-d][1,4]oxazepin-7-yl]benzonitrile;
6-fluoro-2-methyl-3-[(7R,10aS)-2-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-d][1,4]oxazepin-7-yl]benzonitrile;
6-fluoro-2-methyl-3-[(7R,10aR)-2-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-d][1,4]oxazepin-7-yl]benzonitrile;
6-fluoro-2-methyl-3-[(7S,10aR)-2-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydro-2H-pyrazino[1,2-d][1,4]oxazepin-7-yl]benzonitrile;
2-fluoro-3,6-dimethyl-5-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
2-fluoro-3,6-dimethyl-5-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
(3R,9aS)-3-(2,1,3-benzoxadiazol-5-yl)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazine;
(3S,9aS)-3-(4-methyl-2,1,3-benzoxadiazol-5-yl)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazine;
(3R,9aS)-3-(4-methyl-2,1,3-benzoxadiazol-5-yl)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazine;
(3R,9aS)-3-(2,1,3-benzoxadiazol-5-yl)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazine;
(3R,9aS)-3-(2,1,3-benzoxadiazol-5-yl)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazine;
(3S,9aS)-3-(2, 1,3-benzoxadiazol-5-yl)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazine;
2-cyclopropyl-6-fluoro-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
(3R)-3-methyl-6-(9a-methyl-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-3,4-dihydro-1H-isochromen-1-one;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{2-[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]propanoyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{2-[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]propanoyl}octahydropyrazino[2,1-c][1,4]oxazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]thiazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aS)-8-{[5-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]thiazin-3-yl]benzonitrile;
3-[(3S,9aS)-2,2-dioxido-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydropyrazino[2,1-c][1,4]thiazin-3-yl]-6-fluoro-2-methylbenzonitrile;
3-43S,9aS)-8-(2-(2-(1H-tetrazol-1-yl)pyrimidin-5-yl)-2,2-difluoroacetyl)octahydropyrazino[2,1-c][1,4]oxazin-3-yl)-6-fluoro-2-methylbenzonitrile;
3-((3S,9aR)-8-(2-(2-(1H-tetrazol-1-yl)pyrimidin-5-yl)acetyl)octahydro-1H-pyrazino[1,2-a]pyrazin-3-yl)-6-fluoro-2-methylbenzonitrile;
4-methyl-5-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-a]pyrazin-3-yl]-2-benzo furan-1 (314)-one;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydro-2H-pyrazino[1,2-a]pyrazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3S,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-a]pyrazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydro-2H-pyrazino[1,2-a]pyrazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-a]pyrazin-3-yl]benzonitrile;
6-fluoro-2-methyl-3-[(3R,9aR)-8-{[5-(1H-tetrazol-1-yl)pyridin-2-yl]acetyl}octahydro-2H-pyrazino[1,2-a]pyrazin-3-yl]benzonitrile;
(3R)-3-methyl-6-[(3R,9aR)-8-{[6-(1H-tetrazol-1-yl)pyridin-3-yl]acetyl}octahydro-2H-pyrazino[1,2-a]pyrazin-3-yl]-3,4-dihydro-1H-isochromen-1-one;
2-fluoro-5-[(3R,9aR)-8-{[2-(1H-tetrazol-1-yl)pyrimidin-5-yl]acetyl}octahydro-2H-pyrazino[1,2-a]pyrazin-3-yl]benzonitrile;
(3R,9aS)-3-(3-cyano-4-fluoro-2-methylphenyl)-N-[6-(1H-tetrazol-1-yl)pyridin-3-yl]hexahydropyrazino[2,1-c][1,4]oxazine-8(1H)-carboxamide;
(3R,9aR)-3-(3-cyano-4-fluoro-2-methylphenyl)-N-[6-(1H-tetrazol-1-yl)pyridin-3-yl]hexahydropyrazino[2,1-c][1,4]oxazine-8(1H)-carboxamide;
(3R,9aR)-3-(3-cyano-4-fluoro-2-methylphenyl)-N-[5-(1H-tetrazol-1-yl)pyridin-2-yl]hexahydropyrazino[2,1-c][1,4]oxazine-8(1H)-carboxamide;
(3R,9aS)-3-(3-cyano-4-fluoro-2-methylphenyl)-N-[5-(1H-tetrazol-1-yl)pyridin-2-yl]hexahydropyrazino[2,1-c][1,4]oxazine-8(1H)-carboxamide;
(3R,9aR)-3-(3-cyano-4-fluoro-2-methylphenyl)-N-[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]hexahydropyrazino[2,1-c][1,4]oxazine-8(1H)-carboxamide;
(3R,9aS)-3-(3-cyano-4-fluoro-2-methylphenyl)-N-[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]hexahydropyrazino[2,1-c][1,4]oxazine-8(1H)-carboxamide;
(3S,9aR)-3-(3-cyano-4-fluoro-2-methylphenyl)-N-[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]hexahydropyrazino[2,1-c][1,4]oxazine-8(1H)-carboxamide;
(3S,9aS)-3-(3-cyano-4-fluoro-2-methylphenyl)-N-[4-methyl-6-(1H-tetrazol-1-yl)pyridin-3-yl]hexahydropyrazino[2,1-c][1,4]oxazine-8(1H)-carboxamide;
or a pharmaceutically acceptable salt thereof.