trans,trans,trans-1,2,3,4-tetraphenylcyclobutane

1,2,3,4-tetraphenyl-1,3-butadiene

5,10-diphenyl-4b,5,9b,10-tetrahydro-indeno[2,1-a]indene-5,10-diol

4b,9b-dihydroindeno[2,1-a]indene-5,10-dione

1,2-bis(2-phenylethynyl)benzene