142689-09-6 1H-2-Benzopyran-7-carboxylic acid, 4,6-dihydro-5-chloro-8-hydroxy-6-oxo-3-(pentafluoroethyl)- 4,6-Dihydro-5-chloro-8-hydroxy-6-oxo-3-(pentafluoroethyl)-1H-2-benzopyran-7-carboxylic acid