2H-1-Benzothiopyran-2-acetic acid, 8-chloro-3,4-dihydro-5-methoxy-4-oxo- 59429-75-3 8-Chloro-3,4-dihydro-5-methoxy-4-oxo-2H-1-benzothiopyran-2-acetic acid EINECS 261-756-7