Ameliorant of cerebral circulation and optical isomer of nb-818, processes for its production and its use

摘要

An ameliorant of cerebral circulation which contains 2-carbamoyloxymethyl-4-(2,3-dichlorophenyl)-6-methyl-1,4-­dihydropyridine-3,5-dicarboxylic acid 3-isopropyl ester 5-methyl ester as an active ingredient.