2175-90-8 5-(Diphenylmethylene)-1,3-cyclopentadiene 6,6'-Diphenylfulvene 6,6-Diphenylfulvene Benzene, (2,4-cyclopentadien-1-ylidenephenylmethyl)- (9CI) Diphenylfulvene EINECS 218-533-4 Methane, 2,4-cyclopentadien-1-ylidenediphenyl- (8CI) NSC 402188