Natural Product Communications 2015-Jun
Unusual Flavonoid Glycosides from the Hawaiian Tree Metrosideros polymorpha.
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Metrosideros polymorpha is a highly variable and widely-distributed tree native to the Hawaiian islands. We describe here the isolation of two new gossypetin derivatives and three new C-methylated flavonol glycosides, which are highly uncommon and may prove to be useful chemotaxonomic markers for the species. In addition, a wide range of known flavonoid glycosides, chalcones, and terpenoids were isolated alongside the new compounds.