Aporphine alkaloids from the roots of Stephania viridiflavens

@article{Zhang2010AporphineAF,
  title={Aporphine alkaloids from the roots of Stephania viridiflavens},
  author={Mao-sheng Zhang and Guang-yi Liang and Jianping Yu and Wei-dong Pan},
  journal={Natural Product Research},
  year={2010},
  volume={24},
  pages={1243 - 1247}
}
Further investigation on the phytochemistry of the medicinal plant Stephania viridiflavens led to the isolation of a new naturally occurring aporphine alkaloid, (+)-6R, 6aS-isocorydine Nβ -oxide (1), together with three known aporphine alkaloids: (+)-6R, 6aS-corydine Nβ -oxide (2), (+)-N-methyl-laurotetanine (3) and (+)-stepharine (4). The structure and stereochemistry of 1 were determined on the basis of spectroscopic methods and confirmed by synthesis. Alkaloids 2–4 were isolated for the… 
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