Exploring 1617. To explore a different substance…

Methyl 4-[phenyl(propanoyl)amino]-1-[2-(1H-pyrrol-1-yl)ethyl]piperidine-4-carboxylate
 1617  C22H29N3O3  383.484
 Fentanyl
 InChI=1S/C22H29N3O3/c1-3-20(26)25(19-9-5-4-6-10-19)22(21(27)28-2)11-15-24(16-12-22)18-17-23-13-7-8-14-23/h4-10,13-14H,3,11-12,15-18H2,1-2H3
 CEKFELMZQQJCFV-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 COC(=O)C1(CCN(CC1)CCn1cccc1)N(c1ccccc1)C(=O)CC