(E)-(5R,5'S)-3,4,5,3',4',5'-Hexaphenyl-bicyclopentylidene-3,3'-diene-2,2'-dione

4-hydroxy-1,2,5,6,6a-pentaphenylbenzo[e]-as-indacen-3(6aH)-one

2-Benzoyl-4,5,6-triphenyl-resorcin

2-Hydroxy-2-carbaethoxydiazomethyl-3,4,5-triphenyl-cyclopenten-(4)-on-(1)