Patent ID: 7238703

Claim:
Compounds of formula (1) wherein R and R 1 together represent a C 3 -C 5 alkylene or alkenylene group, R 2 -R 5 are each independently selected from hydrogen atoms, C 1 -C 6 alkyl groups, C 2 -C 6 alkenyl groups, C 2 -C 6 alkynyl groups, C 6 -C 12 aryl- C 1 -C 4 alkyl groups, and optionally substituted C 6 -C 12 aryl groups, with the proviso that at least one of R 2 and R 3 and at least one of R 4 and R 5 are other than hydrogen; Y is CH; and Z represents hydrogen atoms attached to Y and N respectively; and pharmaceutically-acceptable acid and base addition salts thereof.