@misc{indiciae8b09439f3ae0,
  title = {Optically active spirotriterpane in petroleum distillates.},
  author = {I R Hills and G W Smith and E V Whitehead},
  year = {1968},
  doi = {10.1038/219243a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/5671422/},
  note = {Source identifier: 5671422}
}