A new macrocyclic phenolic glycoside from Sorghum vulgare root
(2.State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, Guizhou, China 550014)
(3.Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, Guizhou, China 550014)
【Abstract】Eleven compounds were isolated and purified from Sorghum vulgare root extract, through column chromatography over silica gel, MCI gel, and preparative HPLC. Their structures were established by MS, 1D NMR and 2D NMR data as sorgholide A (1), β-sitosterol (2), stigmastero (3), daucosterol (4), 4-methoxycinnamic acid (5), taxiphyllin (6), chlorogenic acid (7), p-hydroxybenzaldehyde (8), succini acid (9), trans-p-hydroxycinnamic acid (10), and obtusalin (11). Compounds 4, 5 and 9–11 were reported from this species for the first time, and compound 1 is the first 24 ring dimeric dilactone glycoside formed by reverse polymerization of p-hydroxyphenylacetate glucoside, named sorgholide A.
【Keywords】 Sorghum vulgare root; chemical constituents; dimeric dilactone ;
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