(1,4-dibromo-3-phenylbut-2-en-2-yl)benzene

2,3-diphenyl-1,4,4a,9a-tetrahydroanthracene-9,10-dione

2,3-dichloro-6,7-diphenylnaphthalene-1,4-dione

1,1-dimethyl-3,4-diphenyl-2,5-dihydrogermole

1,1-dimethyl-3,4-diphenylsilole