methyl 1-(2-phenylethyl)-4-(phenyl-propanoylamino)piperidine-4-carboxylate methyl 1-(2-phenylethyl)-4-(phenyl-propanoyl-amino)piperidine-4-carboxylate 4-(1-oxopropyl-phenylamino)-1-(2-phenylethyl)-4-piperidinecarboxylic acid methyl ester 1-(2-phenylethyl)-4-(phenyl-propionyl-amino)isonipecotic acid methyl ester 60645-15-0 Carfentanila [INN-Spanish] 4-((1-Oxopropyl)phenylamino)-1-(2-phenylethyl)-4-piperidinecarboxylic acid methyl ester 4-Piperidinecarboxylic acid, 4((1-oxopropyl)phenylamino)-1-(2-phenylethyl)-, methyl ester Carfentanila [Spanish] 5-22-13-00537 (Beilstein Handbook Reference) BRN 0456976 CARFENTANIL R-31833 Wildnil Carfentanilum [INN-Latin] Carfentanyl DEA No. 9743 Methyl 1-phenylethyl-4-(N-phenylpropionamido)isonipecotate Methyl 4-(N-(1-oxopropyl)-N-phenylamino)-1-(2-phenylethyl)-4-piperidinecarboxylate Methyl 4-(N-propionyl-N-phenylamino)-1-(2-phenylethyl)-4-piperidine-carboxylate R 31833 R-33799 Methyl 1-phenethyl-4-(N-phenylpropionamido)isonipecotate