1866-54-2 2-BUTANONE, 4,4-DIPHENYL-1-PIPERIDINO- 2-Butanone, 4,4-diphenyl-1-(1-piperidinyl)- 4,4-Diphenyl-1-piperidino-2-butanone 5-20-02-00375 (Beilstein Handbook Reference) BRN 1349560