Contrasting chemistry of fruits and leaves of two Pseudowintera species: Sesquiterpene dialdehyde cinnamates and prenylated flavonoids
Biochemical Systematics and Ecology(2007)
摘要
Two new sesquiterpene dialdehydes, cinnamate 7 and coumarate 8, were isolated from the fruits of Pseudowintera colorata. The known sesquiterpene dialdehydes polygodial 1 and 9-deoxymuzigadial 2 were also found in these fruits, at 5% w/w compared to 0.5% in the leaves. Fruits of Pseudowintera axillaris contained no sesquiterpene dialdehyde cinnamates, even though these are present in the leaves, but did contain prenylated flavanones 11–13. Compounds 7 and 8 are further examples of the rare sesquiterpene dialdehyde cinnamate combination, found exclusively in the family Winteraceae. This is the first report of the uncommon prenylated flavanones in Winteraceae.
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关键词
Pseudowintera colorata,Pseudowintera axillaris,Winteraceae,Sesquiterpenes,Dialdehydes,Cinnamates,Flavanones
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