Pyrrolizidine Alkaloids from Ligularia japonica.

@article{Asada1981PyrrolizidineAF,
  title={Pyrrolizidine Alkaloids from Ligularia japonica.},
  author={Yohei Asada and Tsutomu Furuya and Nobuya Murakami},
  journal={Planta medica},
  year={1981},
  volume={42 6},
  pages={202-3}
}