| abstract |
Platelet agglomeration factor antagonists of formula (I), (II) or (III):n orn where A is optionally substituted benzene, pyridine, napthalene, quinoline, thiophene, benzothiophene, pyrazole or isothiazole,n X is 0, S or NH Y is 1,4 phenylene or a group of formulan R' is H or optionally substituted C 1 -C 4 alkyl, R 2 and R 3 are H or C 1 -C 4 alkyl, B is an optionally fuse 5- or 6-membered ring containing nitrogen atoms, Het is an optionally substituted 5-membered heterocyclic ring containing nitrogen or a pyridine ring, the ring optionally being fused to benzene or nitrogen-containing heterocyclic ring. |