Exploring 14356. To explore a different substance…

{4-[Acetyl(phenyl)amino]-1-(2-phenylethyl)piperidin-4-yl}methyl acetate
 14356  C24H30N2O3  394.507
 Fentanyl
 InChI=1S/C24H30N2O3/c1-20(27)26(23-11-7-4-8-12-23)24(19-29-21(2)28)14-17-25(18-15-24)16-13-22-9-5-3-6-10-22/h3-12H,13-19H2,1-2H3
 JKKGMBZUBBIWEK-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CC(=O)OCC1(CCN(CC1)CCc1ccccc1)N(c1ccccc1)C(=O)C