Exploring 14387. To explore a different substance…

{1-[2-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)ethyl]-4-[phenyl(propanoyl)amino]piperidin-4-yl}methyl acetate
 14387  C27H31N3O5  477.552
 Fentanyl
 InChI=1S/C27H31N3O5/c1-3-24(32)30(21-9-5-4-6-10-21)27(19-35-20(2)31)13-15-28(16-14-27)17-18-29-25(33)22-11-7-8-12-23(22)26(29)34/h4-12H,3,13-19H2,1-2H3
 MJPDBQYVBCRVGG-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1(CCN(CC1)CCN1C(=O)c2c(C1=O)cccc2)COC(=O)C)c1ccccc1