Patent ID: 7638630

Claim:
A compound of formula I or a pharmaceutically-acceptable salt thereof, wherein X is N; R 1 is cycloalkyl, aryl, heterocycle, aralkyl, heterocycle-alkyl, or an oxy derivative, or a group of the formula: R 2 is —NR 4 R 5 , —OR 4 or —C(═O)NR 5 R 6 ; R 3 is tetrazole, —CN, —CH 2 OH or —CO—R 7 ; R 4 is H, —G 1 —R 8 , or a group of formula: R 5 is H, C 1-4 -alkyl; or —NR 4 R 5 represents a heterocycle or —N═CR 9 R 10 ; R 6 is aryl, heterocycle, cycloalkyl or aralkyl; R 7 is hydroxy, amino, hydroxylamino, an oxy derivative or an amino derivative; G 1 is CO, CH 2 , SO 2 ; R 8 is aryl, heterocycle, cycloalkyl, aralkyl or —NH-aryl; R 9 is aryl; and R 10 is ether.