| abstract |
(57) [Abstract] [PROBLEMS] To provide a novel platelet aggregation inhibitor. SOLUTION: In the formula (I), R 1 is hydrogen, C 1 -C 5 Alkyl group, C 3 -C 8 cycloalkyl group, an aralkyl group, an alkoxycarbonylalkyl group or (alkoxycarbonyl aryl) - represents an alkyl group or carboxyalkyl group or (carboxyaryl) alkyl group,; A is optionally mono- or Represents a disubstituted methylene group or ethylene group; R represents hydrogen, a C 1 -C 5 alkyl group, an aryl group or an aralkyl group; Y represents hydrogen, a -COOR 2 group, an aryl group, Representing an aralkyl group or —COR 3 group] or a salt thereof, a method for producing the same and a pharmaceutical composition containing the same: |