4-((1-Oxopropyl)phenylamino)-1-(2-phenylethyl)-4-piperidinecarboxylic acid methyl ester 4-Piperidinecarboxylic acid, 4((1-oxopropyl)phenylamino)-1-(2-phenylethyl)-, methyl ester 4-Piperidinecarboxylic acid, 4-((1-oxopropyl)phenylamino)-1-(2-phenylethyl)-, methyl ester, 2-hydroxy-1,2,3-propanetricarboxylate (1:1) 5-22-13-00537 (Beilstein Handbook Reference) 59708-52-0 60645-15-0 61380-27-6 BRN 0456976 CARFENTANIL Carfentanila [INN-Spanish] Carfentanila [Spanish] 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