N-(1-{3-Oxo-3-[(propan-2-yl)amino]propyl}piperidin-4-yl)-N-phenylpropanamide
 8188  C20H31N3O2  345.479
 Fentanyl
 InChI=1S/C20H31N3O2/c1-4-20(25)23(17-8-6-5-7-9-17)18-10-13-22(14-11-18)15-12-19(24)21-16(2)3/h5-9,16,18H,4,10-15H2,1-3H3,(H,21,24)
 WGXGBAXHDUUCGR-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(c1ccccc1)C1CCN(CC1)CCC(=O)NC(C)C