Exploring 3-Allylfentanyl. To explore a different substance…

3-Allylfentanyl
N-Phenyl-N-[1-(2-phenylethyl)-3-(prop-2-en-1-yl)piperidin-4-yl]propanamide
 3186  C25H32N2O  376.534
 Fentanyl
 InChI=1S/C25H32N2O/c1-3-11-22-20-26(18-16-21-12-7-5-8-13-21)19-17-24(22)27(25(28)4-2)23-14-9-6-10-15-23/h3,5-10,12-15,22,24H,1,4,11,16-20H2,2H3
 BZXKQFFMDLTPJL-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 C=CCC1CN(CCc2ccccc2)CCC1N(c1ccccc1)C(=O)CC