Details
| Parent | Fentanyl |
| Chemical Formula | C₁₄H₂₀N₂O · C₂H₂O₄ |
| Molecular Weight | 322.36 |
| Information | Norfentanyl is a major urinary metabolite of fentanyl, a potent synthetic analgesic sold under various trade names including Sublimaze, Duragesic, Actiq, and Fentora. |
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