A Series of 19′-Hexanoyloxyfucoxanthin Derivatives from the Sea Mussel, Mytilus galloprovincialis, Grown in the Black Sea, Ukraine

A series of carotenoids with 19- or 19'-hexanoyloxy moieties, 19'-hexanoyloxyfucoxanthin (1), 19'-hexanoyloxyfucoxanthinol (2), 19'-hexanoyloxyhalocynthiaxanthin (3), 19-hexanoyloxycrassostreaxanthin A (4), 19-hexanoyloxymytiloxanthin (5), and 19-hexanoyloxyallenicmytiloxanthin (6) were isolated from the edible part of the sea mussel, Mytilus galloprovincialis, grown in the Black Sea, Ukraine. Among them, 3, 4, and 6 were new compounds. These structures were charcterized by UV-vis, fast atom bombardment mass spectrometry, circular dichroism, and H-1 NMR spectroscopic data. They were assumed to be metabolites of 19'-hexanoyloxyfucoxanthin (1).