C21H26N2O
The molecular formula C21H26N2O (molar mass: 322.452 g/mol, exact mass: 322.2045 u) may refer to:
- Acetylfentanyl
- Benzylfentanyl (R-4129)
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The molecular formula C21H26N2O (molar mass: 322.452 g/mol, exact mass: 322.2045 u) may refer to: