2-Methyl carfentanil
Methyl 4-[(2-methylphenyl)(propanoyl)amino]-1-(2-phenylethyl)piperidine-4-carboxylate
 2830  C25H32N2O3  408.533
 Fentanyl
 InChI=1S/C25H32N2O3/c1-4-23(28)27(22-13-9-8-10-20(22)2)25(24(29)30-3)15-18-26(19-16-25)17-14-21-11-6-5-7-12-21/h5-13H,4,14-19H2,1-3H3
 NCXBGGXCWSFMAM-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1(CCN(CC1)CCc1ccccc1)C(=O)OC)c1ccccc1C