Spiro[isobenzofuran-1(3H),9'-[9H]xanthene]-6-carboxylic acid, 3-oxo-3',6'-bis[[(trifluoromethyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester
Spiro[isobenzofuran-1(3H),9'-[9H]xanthene]-6-carboxylic acid, 3-oxo-3',6'-bis[[(trifluoromethyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester