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Hisamitsu Pharmaceutical Co Inc
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Hisamitsu Pharmaceutical Co Inc
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Application filed by Hisamitsu Pharmaceutical Co IncfiledCriticalHisamitsu Pharmaceutical Co Inc
Priority to JP50046642ApriorityCriticalpatent/JPS5826757B2/en
Publication of JPS51136695ApublicationCriticalpatent/JPS51136695A/en
Publication of JPS5826757B2publicationCriticalpatent/JPS5826757B2/en
PURPOSE: Pyrimido [ 4.5 - d ] pyrimidine derivatives of formula I ( where R1 is phenyl or substituted phenyl; R2 is lower alkyl, substituted lower alkyl, unsaturated alkyl or alcoxycarbonyl). For example, 1 - (m - trifluoromethylphenyl) -3 - ethoxycarbonylmethylpyrimido [ 4,5 - d ] pyrimidine - 2, 4 ( 1 H,3 H) - dione.