Butyryl-carfentanyl
Methyl 4-[butanoyl(phenyl)amino]-1-(2-phenylethyl)piperidine-4-carboxylate
 1697 ·  C25H32N2O3 ·  408.533
 Fentanyl
 InChI=1S/C25H32N2O3/c1-3-10-23(28)27(22-13-8-5-9-14-22)25(24(29)30-2)16-19-26(20-17-25)18-15-21-11-6-4-7-12-21/h4-9,11-14H,3,10,15-20H2,1-2H3
 PUORTAOTTIZECP-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCCC(=O)N(C1(CCN(CC1)CCc1ccccc1)C(=O)OC)c1ccccc1