Exploring 14359. To explore a different substance…

{1-(2-Phenylethyl)-4-[phenyl(propanoyl)amino]piperidin-4-yl}methyl acetate
 14359  C25H32N2O3  408.533
 Fentanyl
 InChI=1S/C25H32N2O3/c1-3-24(29)27(23-12-8-5-9-13-23)25(20-30-21(2)28)15-18-26(19-16-25)17-14-22-10-6-4-7-11-22/h4-13H,3,14-20H2,1-2H3
 WMVPXYZJDQWKGQ-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1(CCN(CC1)CCc1ccccc1)COC(=O)C)c1ccccc1