期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 49, 期 2, 页码 747-752出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf001056f
关键词
Yucca; Yucca schidigera; resveratrol; stilbenes; yuccaols A-C; phenolics
Five phenolic constituents have been identified in Yucca schidigera bark, and their structures were established by spectral (FABMS and NMR) experiments. These included two known stilbenes, trans-3,4',5-trihydroxystilbene (resveratrol) and trans-3,3',5,5'-tetrahydroxy-4'-methoxystilbene, as well as three novel compounds, yuccaols A, B, and C, with spiro-structures rarely occurring in the plant kingdom. It is suggested that yuccaols A-C are biosynthethized via attachment of a stilbenic derivative to the carbocationic intermediate of the oxidative flavanone-flavonol conversion.
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