| abstract |
(57) [Summary] [Object] To provide a compound having an excellent herbicidal effect and, in particular, an excellent biological property as compared with the compounds lipophilic to the free carboxylic acids disclosed in the literature. ## STR1 ## Formulas Ia and Ib: Wherein R 1 is hydrogen, alkyl, cycloalkyl, phenyl, R 2 is hydrogen, alkyl, cycloalkyl, R 3 is alkoxy, alkyl, cycloalkyl, Cyanoisoxazole, which means cycloalkenyl, alkenyl, alkynyl or phenyl, each of R 1 to R 3 of which may be substituted with an organic group. |