中文摘要：

利用硅胶和Sephadex LH-20等色谱分离手段从分布于秦岭的玉竹根茎中分离得到4个母核结构碳甲基化和氧甲基化的高异黄烷酮化合物,通过理化性质和光谱学方法及与文献值对照,鉴定化合物的结构分别为甲基麦冬黄烷酮B（Ⅰ）、4’,5,7-三羟基-6,8-二甲基高异黄烷酮（Ⅱ）、4’,5,7-三羟基-6甲基-8甲氧基高异黄烷酮（Ⅲ）和4’,5,7-三羟基-6-甲基高异黄烷酮（Ⅳ）;其中化合物Ⅰ和化合物Ⅳ首次从黄精属植物中得到。

英文摘要：

Column chromatography of silical gel and Sephadex LH-20 methods were used to isolate and purify the chemical constituents from the rhizome of Polygonatum odoratum. The four known rare C-methylated and O-methylated homoisoflavanones were isolated and characterized. The structure of the compound were elucidated by spectroscopic and the data reported in literature. The four methyl-homoisoflavanones were determined as 4＇ -methoxy-5,7-dihydroxy-6,8-dimethyl-homoisflavanone （ Ⅰ ）, 4＇, 5,7-trihydroxy-6,8-dimethyl-homoisflavanone （ Ⅱ ）, 4＇, 5,7-trihydroxy-6-methyl-8-methoxy-homoisflavanone （ Ⅲ） and 4＇ , 5,7-trihydroxy-6-methyl- homoisflavanone（ Ⅳ ）. Compound Ⅰ and Ⅳ were isolated from the Polygortatum genus for the first time.