Exploring 14373. To explore a different substance…

Methyl {4-[phenyl(propanoyl)amino]-1-[2-(thiophen-2-yl)ethyl]piperidin-4-yl}methyl carbonate
 14373  C23H30N2O4S  430.56
 Fentanyl
 InChI=1S/C23H30N2O4S/c1-3-21(26)25(19-8-5-4-6-9-19)23(18-29-22(27)28-2)12-15-24(16-13-23)14-11-20-10-7-17-30-20/h4-10,17H,3,11-16,18H2,1-2H3
 UTYURDKGRZXBGW-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1(CCN(CC1)CCc1cccs1)COC(=O)OC)c1ccccc1