Carotenoid structures, old and new problems

Abstract

Optically active epoxy-ionones and epoxy-carotenoids and their solvolytic conversions to glycols. Syntheses of 3,5,6-trihydroxy-5,6-dihydro-β-endgroups and derived carotenoids. Isolation and structures of 12 novel carotenoids from petals of Rosa foetida: stereoisomeric luteoxanthins, auroxanthins, latoxanthins and latochromes. Revision of the published structures of heteroxanthin, mactraxanthin and other carotenoids having 3,5,6-trihydroxy-β-endgroups. © 1985 IUPAC