corrinoids (cobalamines, corphyrins, corrins, vitamin B12 compounds) 

https://doi.org/10.1351/goldbook.C01350
Derivatives of the corrin nucleus, which contains four reduced or partly reduced pyrrole rings joined in a macrocycle by three groups and one direct carbon–carbon bond linking α positions.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1328 [Terms] [Paper]
See also:
White Book, 2nd ed., p. 272 [Terms] [Book]
Citation: 'corrinoids (cobalamines, corphyrins, corrins, vitamin B12 compounds)' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.C01350 RIS BibTex EndNote
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Last revised: February 24, 2014