Carotenoids and related compounds. Part XX. Structure and reactions of fucoxanthin

Abstract
Fucoxanthin is an allenic carotenoid. Chemical and spectroscopic studies establish its structure as 3′-acetoxy-5,6-epoxy-3,5′-dihydroxy-6′,7′-didehydro-5,6,7,8,5′,6′-hexahydro-β-caroten-8-one (15).