@misc{indiciae7b9a8ff9877e,
  title = {Methotrexate impurities.},
  author = {D M Valerino},
  year = {1972},
  doi = {10.1016/s0140-6736(72)92435-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4116955/},
  note = {Source identifier: 4116955}
}