1H-2-benzopyran-1-one, 3-phenyl- 3-phenyl-1H-isochromen-1-one 4809-08-9 InChI=1/C15H10O2/c16-15-13-9-5-4-8-12(13)10-14(17-15)11-6-2-1-3-7-11/h1-10