Exploring Propyl-norfentanyl. To explore a different substance…

Propyl-norfentanyl
N-Phenyl-N-(1-propylpiperidin-4-yl)propanamide
 3160  C17H26N2O  274.401
 Fentanyl
 InChI=1S/C17H26N2O/c1-3-12-18-13-10-16(11-14-18)19(17(20)4-2)15-8-6-5-7-9-15/h5-9,16H,3-4,10-14H2,1-2H3
 HDNAZKBGDIBSLJ-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCCN1CCC(CC1)N(c1ccccc1)C(=O)CC