A poisonous white crystalline alkaloid, C23H26N2O4, derived from the seeds of nux vomica and closely related plants and used to denature alcohol.

• 番木鳖碱有毒的白色结晶体状生物碱，C23H26N2O4，得自马钱子的种子中，同植物关系极其密切并可用来使酒精变性