1-Butanone, 4-(4-(diphenylmethoxy)-1-piperidinyl)-1-(4-(1-methylethyl)phenyl)- 4-(4-(Diphenylmethoxy)-1-piperidinyl)-1-(4-(1-methylethyl)phenyl)-1-butanone 4-(Diphenylmethoxy)-1-(3-(4-isopropylbenzoyl)propyl)piperidine 97928-26-2