Exploring 3126. To explore a different substance…

N-Phenyl-N-{4-phenyl-1-[2-(thiophen-2-yl)ethyl]piperidin-4-yl}propanamide
 3126  C26H30N2OS  418.594
 Fentanyl
 InChI=1S/C26H30N2OS/c1-2-25(29)28(23-12-7-4-8-13-23)26(22-10-5-3-6-11-22)16-19-27(20-17-26)18-15-24-14-9-21-30-24/h3-14,21H,2,15-20H2,1H3
 SLDUZPASPCDUTB-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1(CCN(CC1)CCc1cccs1)c1ccccc1)c1ccccc1