Methyl 1-[2-oxo-2-(thiophen-2-yl)ethyl]-4-[phenyl(propanoyl)amino]piperidine-4-carboxylate
 1621 ·  C22H26N2O4S ·  414.518
 Fentanyl
 InChI=1S/C22H26N2O4S/c1-3-20(26)24(17-8-5-4-6-9-17)22(21(27)28-2)11-13-23(14-12-22)16-18(25)19-10-7-15-29-19/h4-10,15H,3,11-14,16H2,1-2H3
 QYCIALJXYYAMSV-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1(CCN(CC1)CC(=O)c1cccs1)C(=O)OC)c1ccccc1