# porphyrins

> group of compounds containing four pyrrole rings connected by methine bridges in a cyclic configuration

**Wikidata**: [Q422926](https://www.wikidata.org/wiki/Q422926)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Porphyrin)  
**Source**: https://4ort.xyz/entity/porphyrins


## References

1. Glossary of Class Names of Organic Compounds and Reactive Intermediates Based on Structure (IUPAC Recommendations 1995)
2. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=52520)
3. Sea as a color palette: the ecology and evolution of fluorescence
4. Gene Ontology release 2019-11-16
5. Nuovo soggettario
6. Freebase Data Dumps. 2013
7. THE PIGMENTATION OF MOLLUSCAN SHELLS
8. UMLS 2023
9. Great Norwegian Encyclopedia
10. National Library of Israel Names and Subjects Authority File
11. GF WordNet
12. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)