Exploring 3-Methyl-thiofentanyl. To explore a different substance…

3-Methyl-thiofentanyl
N-{3-Methyl-1-[2-(thiophen-2-yl)ethyl]piperidin-4-yl}-N-phenylpropanamide
 2632  C21H28N2OS  356.525
 Fentanyl
 InChI=1S/C21H28N2OS/c1-3-21(24)23(18-8-5-4-6-9-18)20-12-14-22(16-17(20)2)13-11-19-10-7-15-25-19/h4-10,15,17,20H,3,11-14,16H2,1-2H3
 SRARDYUHGVMEQI-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1CCN(CC1C)CCc1cccs1)c1ccccc1