@misc{indiciae7ee5325542e7,
  title = {6alpha-substituted penicillins.},
  author = {Y S Lo and J C Sheehan},
  year = {1975},
  doi = {10.1021/jo00890a009},
  url = {https://pubmed.ncbi.nlm.nih.gov/1133614/},
  note = {Source identifier: 1133614}
}