(Benzoyl (phenyl) methyl)-2 hydroxy-2 dioxo-1,3 indane [French] 1H-Indene-1,3(2H)-dione, 2-hydroxy-2-(2-oxo-1,2-diphenylethyl)- 2-Hydroxy-2-(2-oxo-1,2-diphenylethyl)-1H-indene-1,3(2H)-dione 70780-58-4