Disclosed is an optically active substance represented by the formula: ##STR1## wherein m is an integer of 1 to 14, Y is ##STR2## R is --C.sub.n H.sub.2n+1, --OC.sub.n H.sub.2n+1, --OCOC.sub.n H.sub.2n+1 or --COOC.sub.n H.sub.2n+1 (in which n is an integer of 1 to 18), each of the asterisked carbon atoms is an asymmetric carbon atom, X a single bond, --CO.sub.2 --, or --OCO--, and A.sub.1 and A.sub.2 is hydrogen, fluorine, chlorine, bromine, cyano or methoxy.
本发明公开了一种光学活性物质,其
化学式表示为:##STR1## 其中,m为1至14的整数,Y为##STR2## R为--C.sub.n H.sub.2n+1,--OC.sub.n H.sub.2n+1,--OCOC.sub.n H.sub.2n+1或--COOC.sub.n H.sub.2n+1(其中n为1至18的整数),每个星号标记的碳原子均为不对称碳原子,X为单键,--CO.sub.2 --或--OCO--,A.sub.1和A.sub.2为氢、
氟、
氯、
溴、
氰或甲氧基。