2,3-Diphenylcycloprop-2-en-1-one 2,3-Diphenylcyclopropenone 2-Cyclopropen-1-one, 2,3-diphenyl- (9CI) 886-38-4 Cyclopropenone, 2,3-diphenyl- Cyclopropenone, diphenyl- (8CI) Diphencyprone Diphenylcyclopropenone EINECS 212-948-4 NSC 57541