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These stable nonaromatic structures incorporate aldehyde substituents, macrocyclic ketones, two conjugated pyrrole units, and a pyrrolo[1,2-a]pyrrole moiety. The NMR and UV-vis data were consistent with a nonaromatic system, and single-crystal X-ray diffraction confirmed that these structures are highly distorted. Structural characterization of a related aromatic carbaporphyrin triketone was also accomplished.<\/jats:p>","DOI":"10.1021\/acs.joc.6c01802","type":"journal-article","created":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T10:01:52Z","timestamp":1791367312000},"page":"14374-14380","source":"Crossref","is-referenced-by-count":0,"title":["Spectroscopic and Structural Characterization of Unexpected Porphyrinoid Byproducts Resulting from the Reaction of a Cyclopentadiene Trialdehyde with\n                    <i>N<\/i>\n                    -Alkyltripyrranes"],"prefix":"10.1021","volume":"91","author":[{"given":"Kimberly","family":"Le","sequence":"first","affiliation":[{"name":"Illinois State University , , , ,","place":["Normal, Illinois, United States, 61790-4160"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7549-3856","authenticated-orcid":true,"given":"Gregory M.","family":"Ferrence","sequence":"additional","affiliation":[{"name":"Illinois State University , , , ,","place":["Normal, Illinois, United States, 61790-4160"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0050-0385","authenticated-orcid":true,"given":"Timothy D.","family":"Lash","sequence":"additional","affiliation":[{"name":"Illinois State University , , , ,","place":["Normal, Illinois, United States, 61790-4160"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,10,7]]},"reference":[{"key":"2026103005084997200_cit1","doi-asserted-by":"crossref","DOI":"10.1093\/oso\/9780198553809.001.0001","volume-title":"The Colours of Life","author":"Milgrom","year":"1997"},{"key":"2026103005084997200_cit2a","doi-asserted-by":"publisher","first-page":"573","DOI":"10.1039\/b405679p","article-title":"Enantioselective Epoxidation of Olefins with Chiral Metalloporphyrin Catalysts","volume":"34","author":"Rose","year":"2005","journal-title":"Chem. 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