C₁₈H₂₅N

The molecular formula C₁₈H₂₅N (molar mass: 255.40 g/mol, exact mass: 255.1987 u) may refer to:

• Dimemorfan, or 3,17-dimethylmorphinan, a cough suppressant of the morphinan family
• Naphthylpropylaminopentane
• Volazocine, an opioid analgesic of the benzomorphan class which was never marketed