Compounds which can be represented by general formula (I) indicated below, ##STR1## and in which the anthranilic acid aromatic ring may be mono- or di-substituted by the R.sub.1 group which can be selected independently from hydrogen, methyl and chloro, and in which the substituents at the chiral center (marked with an asterik in formula (I)) have the R (Rectus) configuration.
化合物,其可以由下述通式(I)表示,##STR1## 其中,
邻氨基苯甲酸芳环可被R1基团单取代或双取代,R1基团可独立选自氢、甲基和
氯,且在手性中心(在通式(I)中标有星号处)的取代基具有R(右旋)构型。