@misc{indiciae587638257cea,
  title = {Diterpenoids from Haplopappus rigidus.},
  author = {G Morales and P Sierra and L A Loyola and J Borquez},
  year = {2000},
  doi = {10.1016/s0031-9422(00)00321-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/11140515/},
  note = {Source identifier: 11140515}
}