Methyl 1-[2-hydroxy-2-(thiophen-2-yl)ethyl]-4-[phenyl(propanoyl)amino]piperidine-4-carboxylate
 1622 ·  C22H28N2O4S ·  416.534
 Fentanyl
 InChI=1S/C22H28N2O4S/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/h4-10,15,18,25H,3,11-14,16H2,1-2H3
 KEMSHQVPVQSVOX-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 COC(=O)C1(CCN(CC1)CC(c1cccs1)O)N(c1ccccc1)C(=O)CC