| 摘要 |
Dihydropyridine derivatives represented by the formula (I), wherein R<1>, R<2>, and R<3>, which may be the same or different, each represents alkyl, cycloalkyl or alkoxyalkyl, R<4> and R<5>, which may be the same or different, each represents hydrogen, halogen, nitro, trifluoromethyl, alkyl, cycloalkyl, alkoxy, cyano, alkoxycarbonyl or alkylthio, R<6> represents hydrogen, alkyl, cycloalkyl, aralkyl, aryl or pyridyl, X represents oxygen, sulfur, vinylene, azomethine, or a group represented by <IMAGE> A represents alkylene, Ar represents aryl or pyridyl, m represents an integer of 1 to 3, and n represents an integer of 0 to 2, and acid addition salts thereof are useful as prophylactic and therapeutic agents for diseases of the circulatory system. |
