Exploring 14363. To explore a different substance…

Ethyl {1-(2-phenylethyl)-4-[phenyl(propanoyl)amino]piperidin-4-yl}methyl carbonate
 14363  C26H34N2O4  438.559
 Fentanyl
 InChI=1S/C26H34N2O4/c1-3-24(29)28(23-13-9-6-10-14-23)26(21-32-25(30)31-4-2)16-19-27(20-17-26)18-15-22-11-7-5-8-12-22/h5-14H,3-4,15-21H2,1-2H3
 NRJDMTIMIPKSGW-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCOC(=O)OCC1(CCN(CC1)CCc1ccccc1)N(c1ccccc1)C(=O)CC