3-benzhydrylidene-2-benzofuran-1-one

2,2-di(3,4-dimethoxyphenyl)indane-1,3-dione

2,2-Di-p-tolyl-indan-1,3-dion

2,2-Bis-(4-chloro-phenyl)-indan-1,3-dione

2,2-bis(4-iodophenyl)-1H-indene-1,3(2H)-dione