15430 IUPAC Gold Book - main ring 10.1351/goldbook.15430 15430 current 1 Macrocycle in a bridged polycyclic macromolecule or polycyclic macromolecular portion that contains the subunits of highest seniority. In macrocyclic molecules with macrocyclic substituents, the ring that contains the subunits of highest seniority is called the parent macrocycle or macrocyclic system. polycyclic macromolecule https://goldbook.iupac.org//terms/view/15432 PAC, 2008, 80, 201. 'Structure-based nomenclature for cyclic organic macromolecules (IUPAC Recommendations 2008)' on page 205 (https://doi.org/10.1351/pac200880020201) https://goldbook.iupac.org/terms/view/15430/html https://goldbook.iupac.org/terms/view/15430/json https://goldbook.iupac.org/terms/view/15430/plain Citation: 'main ring' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.15430 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-06-28T22:02:36+00:00