142689-10-9 1H-2-Benzopyran-7-carboxylic acid, 3,4-dihydro-5-chloro-6,8-dihydroxy-3-(pentafluoroethyl)- 3,4-Dihydro-5-chloro-6,8-dihydroxy-3-(pentafluoroethyl)-1H-2-benzopyran-7-carboxylic acid