Dihydropyridine derivatives, their production and use

Abstract From the Canadian patent

Novel dihydropyridine derivatives and acid addition salts thereof which are of use as prophylactic or/and therapeutic drugs for cardiovascular diseases, said dihydropyridine derivatives having the formula wherein R1, R2 and R3 are the same or different and each is alkyl cycloalkyl, or alkoxyalkyl; R4 and R5 are the same or different and each is hydrogen halogen, nitro, trifluoromethyl, alkyl cycloalkyl, alkoxy, cyano, alkoxycarbonyl or alkylthio; R6 is hydrogen, alkyl, cycloalkyl aralkyl, aryl or a pyridyl;, X is oxygen sulfur vinylene, azomethine or a group of the formula or , ; A is alkylene; Ar is aryl or a, pyridyl; m is an integer of 1 to 3; n is an integer of 0 to 2.