), formally derived from the acyclic parent, Ψ,Ψ-carotene I by hydrogenation, dehydrogenation, cyclization, oxidation, or combination of these processes. This class includes carotenes, xanthophylls and certain compounds that arise from rearrangement of the skeleton of I or by loss of part of this structure. retinoids are excluded.
See also: retro
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1326 (https://doi.org/10.1351/pac199567081307)