| abstract |
(57) [Problem] To provide an agent having an excellent antianginal effect and useful as an agent for preventing or treating angina pectoris. SOLUTION: The general formula: [Wherein R 1 is H, a C 1 -C 4 alkyl group, a phenyl group, a substituted phenyl group; a phenyl-C 1 -C 2 alkyl group, a substituted phenyl-C 1 -C 2 alkyl group; R 2 : C 1 -C 6 alkyl group; n: 1-2. ] An optically active thiazolidinone derivative having the formula: |