Fentanyl N-oxide
N-[1-Oxo-1-(2-phenylethyl)-1λ5-piperidin-4-yl]-N-phenylpropanamide
 6476 C22H28N2O2 352.47
 Fentanyl
 InChI=1S/C22H28N2O2/c1-2-22(25)23(20-11-7-4-8-12-20)21-14-17-24(26,18-15-21)16-13-19-9-5-3-6-10-19/h3-12,21H,2,13-18H2,1H3
 RYSCOBQROPDNKR-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 CCC(=O)N(c1ccccc1)C1CC[N+](CC1)([O-])CCc1ccccc1