curprev13:5013:50, 15 July 2022 Shinkolobwetalkcontribs 30,772 bytes+34 →Occurrence in nature: Pyrrole itself is not naturally occurring, {{citation needed|July 2022}}. Too strong affirmation because pyrrole can probably be found in petroleum and coal in the subsurface environment where natural organic matter was submitted to a sufficient thermal stress at great depthundo
curprev02:1302:13, 22 April 2021 Citation bottalkcontribs 30,463 bytes+169 Alter: url, pages. URLs might have been anonymized. Add: pmid, doi, issue, bibcode, authors 1-1. Removed parameters. Some additions/deletions were parameter name changes. | Use this bot. Report bugs. | Suggested by Graeme Bartlett | via #UCB_toolbarundo