An optically active carboxylic acid derivative represented by the general formula ##STR1## wherein R represents a normal alkyl group having 1 to 20 carbon atoms, m and n represent 0 or 1 but are not 1 at the same time, X represents a hydrogen or halogen atom, Y represents a hydrogen or fluorine atom, provided that when Y is a hydrogen atom, X is a halogen atom, and that when n is 0, Y is a hydrogen atom, and Q* represents an optically active alkyl or 1-alkoxyethyl group having an asymmetric carbon atom.
由一般公式表示的光学活性
羧酸衍
生物,其中R代表具有1到20个碳原子的正构烷基基团,m和n代表0或1,但不能同时为1,X代表氢或卤素原子,Y代表氢或
氟原子,前提是当Y是氢原子时,X是卤素原子,当n为0时,Y是氢原子,Q*代表具有手性碳原子的光学活性烷基或1-烷氧乙基基团。