Patent ID: 8889677

Claim:
A compound of formula I in which A and B independently represent CH or N; R 1 represents phenylethynyl, C 3-6 cycloalkylethynyl, C 2-5 alkenyl, C 5-7 cycloalkenyl, aryl, heteroaryl, C 1-8 alkyl, C 3-7 cycloalkyl or —O—C 1-8 alkyl which latter five groups are optionally substituted with one or more substituents selected from halogen, cyano, C 1-3 alkyl, C 3-6 cycloalkyl, —O—C 1-3 alkyl, —CH 2 —O—CH 3 , —CH 2 -morpholine and —CH 2 CN which latter six substituents are optionally substituted with one or more fluorine atoms; R 2 and R 3 independently represent —H, halogen,—CN, —COO—C 1-4 alkyl, C 1-5 alkyl, C 3-5 cycloalkyl or —O—C 1-5 alkyl which latter four groups are optionally substituted with one or more fluorine atoms; Ar represents; or a physiologically acceptable salt thereof.