1H-indene-1,3(2H)-dione, 2-phenyl- 2-phenyl-1H-indene-1,3(2H)-dione 83-12-5 InChI=1/C15H10O2/c16-14-11-8-4-5-9-12(11)15(17)13(14)10-6-2-1-3-7-10/h1-9,13