Object or its Which are closed in the diphenylglycollic acid esterification that public Open is indicated by lower formula (I), and wherein R indicates the fluoro low Grade alkyl for appointing Election to replace.公開了由下式(I)表示的二苯乙醇酸酯化合物或其鹽,其中R表示任選取代的氟代低級烷基。