(N-Methyl piperidylene-4) diphenyl methane [French] 4-(Diphenylmethylene)-1-methylpiperidine 5-20-08-00324 (Beilstein Handbook Reference) 6071-93-8 BRN 0208076 NSC 31633 Piperidine, 4-(diphenylmethylene)-1-methyl-