Exploring 3127. To explore a different substance…

N-(2-Fluorophenyl)-N-{4-phenyl-1-[2-(thiophen-2-yl)ethyl]piperidin-4-yl}propanamide
 3127  C26H29FN2OS  436.585
 Fentanyl
 InChI=1S/C26H29FN2OS/c1-2-25(30)29(24-13-7-6-12-23(24)27)26(21-9-4-3-5-10-21)15-18-28(19-16-26)17-14-22-11-8-20-31-22/h3-13,20H,2,14-19H2,1H3
 GKSDPGGOSNBYAC-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1(CCN(CC1)CCc1cccs1)c1ccccc1)c1ccccc1F