中药桂枝化学成分研究

该文对桂枝中的化学成分进行了研究。采用硅胶柱色谱、凝胶(Sephadex LH-20)柱色谱、制备高效液相色谱等方法分离纯化桂枝中的化学成分,并根据波谱数据进行结构鉴定。从中分离鉴定了22个化合物,分别为dihydrorosavin(1),rosavin(2),1-phenyl-propane-1,2,3-triol(3),patchoulol(4),graphostromane B(5),(+)-lyoniresinol-3a-O-β-D-glucopyranoside(6),(-)-lyoniresinol-3a-O-β-D-glucopyranoside(7),cinnacaside(8),subaveniumin A(9),3-phenyl-2-propenyl-6-O-L-arabinopyranosyl-β-glucopyranoside(10),2-phenylethyl-β-vicianoside(11),cinnacasol(12),[(2R,3S,4S,5R,6R)-6-(benzyloxy)-3,4,5-trihydroxytetrahydro-2H-pyran-2-yl]methyl hydrogen sulfate(13),coniferyl aldehyde(14),(2R,3R)-5,7-dimethoxy-3′,4′-methylenedioxyflavan-3-ol(15),cinnacassin L(16),E-cinnamic alcohol(17),(E)-3-(2-methoxyphenyl)-2-propen-1-ol(18),2-hydroxyphenylpropanol(19),cinnamomulactone(20),(+)-syringaresinol(21)和cinnamomumolide(22)。其中化合物1为新化合物,3~7,9~11,13,15,18及19均为首次从桂枝中分离得到。

Research advances in the treatment of Alzheimer＇s disease with polysaccharides from traditional Chinese medicine

Alzheimer's disease(AD) is a neurodegenerative disorder characterized by the loss of patients' memory and their cognitive abilities and the mechanism is not completely clear. Although a variety of drugs have been approved for the AD treatment, substances which can prevent and cure AD are still in great need. The effect of polysaccharides from traditional Chinese medicine(TCM) on anti-AD has gained great progress and attained more and more attention in recent years. In this review, research advances in TCM-polysaccharides on AD made in this decade are summarized.