1-Phenethyl-4-(N-phenylpropionamido)piperidine 1-Phenethyl-4-N-propionylanilinopiperidine 437-38-7 5-22-08-00049 (Beilstein Handbook Reference) 80832-90-2 990-73-8 BRN 0494484 DEA No. 9801 Durogesic EINECS 207-113-6 FENTANYL Fentanest Fentanil Fentanil [DCIT] Fentanila Fentanila [INN-Spanish] Fentanylum Fentanylum [INN-Latin] HSDB 3329 N-(1-Phenethyl-4-piperidinyl)-N-phenylpropionamide N-(1-Phenethyl-4-piperidyl)propionanilide N-Phenethyl-4-(N-propionylanilino)piperidine N-Phenyl-N-(1-(2-phenylethyl)-4-piperidinyl)propanamide Phentanyl Propanamide, N-phenyl-N-(1-(2-phenylethyl)-4-piperidinyl)- (9CI) Propionanilide, N-(1-phenethyl-4-piperidyl)- R 4263 Sentonil