Patent ID: 7872012

Claim:
A compound of formula (I), wherein R and R 1 are independently selected from the group consisting of hydrogen, C 1 -C 6 alkyl, C 3 -C 8 cycloalkyl, C 2 -C 6 alkenyl, C 3 -C 8 cycloalkenyl, C 6 -C 12 aryl and C 5 -C 11 heteroaryl groups, which (except hydrogen) may be substituted by 1 to 3 substituents selected from the group consisting of halogen, R 3 R 4 N—, NO 2 , CN, OH, C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, C 1 -C 6 alkoxy, C 6 -C 12 aryloxy, C 7 -C 20 aralkoxy, C 1 -C 6 alkanoyl, sulfonyl and sulfinyl, where each R 3 and R 4 independently represents H, C 1 -C 6 alkyl or C 6 -C 12 aryl; R 2 is selected from the group consisting of hydrogen, C 1 -C 6 alkyl, C 3 -C 8 cycloalkyl, C 2 -C 6 alkenyl, C 3 -C 8 cycloalkenyl, C 6 -C 12 aryl and C 5 -C 11 heteroaryl groups, which (except hydrogen) may be substituted by 1 to 3 substituents selected from the group consisting of halogen, R 3 R 4 N—, NO 2 , CN, OH, C 1 -C 6 alkyl, C 3 -C 8 cycloalkyl, C 6 -C 12 aryl, C 1 -C 6 alkoxy, C 6 -C 12 aryloxy, C 7 -C 20 aralkoxy, C 1 -C 6 alkylthio, C 6 -C 12 arylthio, C 7 -C 20 aralkylthio, C 1 -C 6 alkanoyl, sulfonyl and sulfinyl, where R 3 and R 4 are as defined previously; B is —CH 2 —CH 2 — or —CH═CH—; and Y represents wherein R 5 is hydrogen or C 1 -C 6 alkyl, and R 6 represents hydrogen, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 6 -C 12 aryl, C 7 -C 20 aralkyl, C 7 -C 20 alkaryl or a pharmacologically non-toxic ion.