4-(1，1，3，3-tetramethyl-2-oxo-2，3-dihydro-1H-indene-5-carboxamido)benzoic acid;4-(1，1，3，3-tetramethyl-2-oxo-2，3-dihydro-1H-indene-5-carboxamido)benzoic acid

4-(1，1，3，3-tetramethyl-2-oxo-2，3-dihydro-1H-indene-5-carboxamido)benzoic acid;4-(1，1，3，3-tetramethyl-2-oxo-2，3-dihydro-1H-indene-5-carboxamido)benzoic acid ≥98%