Exploring 3123. To explore a different substance…

N-[1-(2-Hydroxy-2-phenylethyl)-4-(methoxymethyl)-3-methylpiperidin-4-yl]-N-phenylpropanamide
 3123  C25H34N2O3  410.549
 Fentanyl
 InChI=1S/C25H34N2O3/c1-4-24(29)27(22-13-9-6-10-14-22)25(19-30-3)15-16-26(17-20(25)2)18-23(28)21-11-7-5-8-12-21/h5-14,20,23,28H,4,15-19H2,1-3H3
 PBAULXJHHFRWHQ-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 COCC1(CCN(CC1C)CC(c1ccccc1)O)N(c1ccccc1)C(=O)CC