2-AMINO OR METHYL SULFONYL-6-AMINO SULFONYL OR MILKY SULFONYL-4,8-DIPIPERIDINO OR MORPHOLINOPYRIMIDO{8 5,4-d{9 {11 PYRIMIDINES

摘要

This invention relates to a novel pyrimido[5,4-d]-pyrimidine derivative having sulfonyl groups or a sulfonyl group substituted by a substituted or non-substituted amino group or an alkyl group at the 2- and/or 6-position. The pyrimidine derivative is useful as a platelet aggregation inhibiting agent.