@misc{indiciaee755ea281d47,
  title = {Papaverine crown ethers.},
  author = {F Vögtle and K Frensch},
  year = {1976},
  doi = {10.1002/anie.197606851},
  url = {https://pubmed.ncbi.nlm.nih.gov/826193/},
  note = {Source identifier: 826193}
}