Exploring (methylene) Fentanyl. To explore a different substance…

(methylene) Fentanyl
N-Benzyl-N-[1-(2-phenylethyl)piperidin-4-yl]propanamide
 11898  C23H30N2O  350.497
 Fentanyl
 InChI=1S/C23H30N2O/c1-2-23(26)25(19-21-11-7-4-8-12-21)22-14-17-24(18-15-22)16-13-20-9-5-3-6-10-20/h3-12,22H,2,13-19H2,1H3
 QOHQCOIBQCEEGL-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(C1CCN(CC1)CCc1ccccc1)Cc1ccccc1