Methyl 4-[phenyl(propanoyl)amino]-1-[2-(pyridin-2-yl)ethyl]piperidine-4-carboxylate
 1626  C23H29N3O3  395.495
 Fentanyl
 InChI=1S/C23H29N3O3/c1-3-21(27)26(20-10-5-4-6-11-20)23(22(28)29-2)13-17-25(18-14-23)16-12-19-9-7-8-15-24-19/h4-11,15H,3,12-14,16-18H2,1-2H3
 NAFXKXKBHMBSRZ-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1(CCN(CC1)CCc1ccccn1)C(=O)OC)c1ccccc1