Exploring α-Methyl-thiofentanyl. To explore a different substance…

α-Methyl-thiofentanyl
N-Phenyl-N-{1-[1-(thiophen-2-yl)propan-2-yl]piperidin-4-yl}propanamide
 2630  C21H28N2OS  356.525
 Fentanyl
 InChI=1S/C21H28N2OS/c1-3-21(24)23(18-8-5-4-6-9-18)19-11-13-22(14-12-19)17(2)16-20-10-7-15-25-20/h4-10,15,17,19H,3,11-14,16H2,1-2H3
 YPOXDUYRRSUFFG-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(c1ccccc1)C1CCN(CC1)C(Cc1cccs1)C