5-(4-bromophenyl)-2,3-bis(4-methylphenyl)furan

5,6-bis(4-methylphenyl)-2,3-dihydropyrazine

2,3-bis(4-methylphenyl)-5,6,7,8-tetrahydro-1,4-dioxocine

3,6-dimethylphenanthrene-9,10-dione

3,4-bis(4-methylphenyl)thiophene-2,5-dicarboxylic acid