Acetylfentanyl
N-Phenyl-N-[1-(2-phenylethyl)piperidin-4-yl]acetamide
 692 ·  C21H26N2O ·  322.444
 Fentanyl
 InChI=1S/C21H26N2O/c1-18(24)23(20-10-6-3-7-11-20)21-13-16-22(17-14-21)15-12-19-8-4-2-5-9-19/h2-11,21H,12-17H2,1H3
 FYIUUQUPOKIKNI-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CC(=O)N(c1ccccc1)C1CCN(CC1)CCc1ccccc1