An optical isomer of a compound having the formula:
wherein the two methyl groups at 4- and 6-positions of the dioxaphosphorinane ring assume trans configurations to each other, which has a levo-rotatory angle of optical rotation attributable to the asymmetric carbon atom at 4-position of the dihydropyridine ring, and a pharmaceutically acceptable salt thereof.
一种具有以下式子的化合物的光学异构体
其中二氧
磷环 4 位和 6 位上的两个甲基彼此呈反式构型,其光学旋转角度为
二氢吡啶环 4 位上不对称碳原子的左旋角,以及其药学上可接受的盐。