The optically active compound (R)-2-amino-1,4-dihydro-6-methyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic acid 3-(1-diphenylmethylazetidin-3-yl) ester 5-isopropyl ester or a pharmacologically acceptable salt thereof, and a method using the compound or its salt to treat circulatory diseases.
                            具有光学活性的化合物(R)-2-
氨基-1,4-二氢-6-甲基-4-(3-
硝基苯基)-3,5-
吡啶二
羧酸3-(1-二苯甲基
氮杂环丙烷-3-基)酯5-异
丙酯或其药学上可接受的盐,并使用该化合物或其盐治疗循环系统疾病的方法。