4-azido-3',3''-dichloro-4',4''-dimethoxy-5',5''-bis(methoxycarbonyl)-1,1-diphenyl-1-butene

3',3''-dichloro-4-methanesulfonyloxy-4',4''-dimethoxy-5',5''-bis(methoxycarbonyl)-1,1-diphenyl-1-butene

3',3''-dichloro-4',4''-dihydroxy-5',5''-bis(methoxycarbonyl)-1,1-diphenyl-1-heptene

5,5'-(hept-1-ene-1,1-diyl)bis(3-chloro-2-methoxybenzoyl chloride)

3',3''-dichloro-5',5''-dicarboxy-4',4''-dimethoxy-1,1-diphenyl-1-heptene