Exploring Acetylthiofentanyl. To explore a different substance…

Acetylthiofentanyl
N-Phenyl-N-{1-[2-(thiophen-2-yl)ethyl]piperidin-4-yl}acetamide
 7943  C19H24N2OS  328.472
 Fentanyl
 InChI=1S/C19H24N2OS/c1-16(22)21(17-6-3-2-4-7-17)18-9-12-20(13-10-18)14-11-19-8-5-15-23-19/h2-8,15,18H,9-14H2,1H3
 ARJOBYJYPZUJLD-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CC(=O)N(c1ccccc1)C1CCN(CC1)CCc1cccs1