Exploring Phenylacetylfentanyl. To explore a different substance…

Phenylacetylfentanyl
N,2-Diphenyl-N-[1-(2-phenylethyl)piperidin-4-yl]acetamide
 1646  C27H30N2O  398.54
 Fentanyl
 InChI=1S/C27H30N2O/c30-27(22-24-12-6-2-7-13-24)29(25-14-8-3-9-15-25)26-17-20-28(21-18-26)19-16-23-10-4-1-5-11-23/h1-15,26H,16-22H2
 QIGINNCOUQLAIF-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 O=C(N(c1ccccc1)C1CCN(CC1)CCc1ccccc1)Cc1ccccc1