申请人:Laboratoire L. Lafon
公开号:US05633383A1
公开(公告)日:1997-05-27
The invention relates to a process which comprises the crystallization of a calcium salt of chiral (R or S) lactic acid esterified with a racemic dihydropyridine.
该发明涉及一种过程,其中包括结晶由光学异构体(R或S)乳酸酯化的钙盐和外消旋二氢吡啶。