2-(2,7-Difluoro-6-hydroxy-3-oxo-3H-xanthen-9-yl)benzoic Acid, is an intermediate used for the synthesis of 4',5'-Bis(1,3,2-dithiarsolan-2-yl)-2',7'-difluoro-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one (B431935), a fluorinated biarsenical derivatives, used as probes.
