@misc{indiciaea4a9697afebd,
  title = {The structure of tryptanthrin.},
  author = {M Brufani and W Fedeli and F Mazza and A Gerhard and W Keller-Schierlein},
  year = {1971},
  doi = {10.1007/bf02136666},
  url = {https://pubmed.ncbi.nlm.nih.gov/5134261/},
  note = {Source identifier: 5134261}
}