4-(2,1,3-BENZOXADIAZOL-4-YL)-1,4-DIHYDROPYRIDINE-3,5-DICARBOXYLIC ACID ESTER DERIVATIVES IN OPTICALLY ACTIVE FORM,THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

The invention relates to a process for preparing novel optically active 1,4-dihydropyridine derivatives of the formula I in which one of the substituents R1 and R2 and the other is isopropyl and R3 is optionally substituted C1-6-alkyl, and the acid addition salts thereof. IMAGE