Exploring 14371. To explore a different substance…

{4-[Butanoyl(phenyl)amino]-1-[2-(thiophen-2-yl)ethyl]piperidin-4-yl}methyl butanoate
 14371  C26H36N2O3S  456.641
 Fentanyl
 InChI=1S/C26H36N2O3S/c1-3-9-24(29)28(22-11-6-5-7-12-22)26(21-31-25(30)10-4-2)15-18-27(19-16-26)17-14-23-13-8-20-32-23/h5-8,11-13,20H,3-4,9-10,14-19,21H2,1-2H3
 MUJQRZSLPIIITG-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCCC(=O)N(C1(CCN(CC1)CCc1cccs1)COC(=O)CCC)c1ccccc1