@misc{indiciaec290e4d72833,
  title = {Pyrroles and related compounds. X.},
  author = {Budzikiewicz, H. and Djerassi, C. and Jackson, A. H. and Kenner, G. W. and Wilson, J. M.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19680057992},
  note = {Source identifier: 19680057992}
}