杜仲内树皮化学组成及抽提成分的研究(英文)

Study on Chemical Compositions of Eucommia ulmoides Oliv. Inner Bark and Its Extractives

研究了杜仲内树皮及其抽提物的一般物、矿物质、脂肪酸与单糖的化学组成。结果表明，碳水化合物（92．97％）、钙（5．1769mg／g）、α-亚麻酸（27．4％）及葡萄糖（130．51mg／g）分别是杜仲内树皮的一般物、矿物质、脂肪酸与单糖的主要组成成分。采用Sephadex LH-20柱色谱及薄层色谱等方法，从其70％丙酮提取物水溶性部分分到5种化合物，经波谱分析及理化性质化舍物分别鉴定为：紫云英苷（1）、异槲皮苷（2）、槲皮素-3-O-木糖葡萄糖苷（3）、异绿原酸A（4）、异绿原酸C（5）。化合物3—5为首次从该植物中分得。

Chemical compositions, including proximate composition, mineral, fatty acid and monosaccharide compositions of inner barks and extractives of the Eucommia ulmoides Oliv. were studied. Carbohydrate （ 92.97 % ） was the major constituent in proximate composition of E. ulmoides inner barks. The most quantitatively abundant constituents of fatty acid, mineral and monosaccharide compositions were α-linolenic acid （ 27.4 % ）, Ca （ 5. 176 9 mg/g ） and glucose （ 130. 51 mg/g ）, respectively. From the water soluble fraction of E. ulmoide inner barks, 5 compounds were isolated and their structures were elucidated as astragalin （ 1 ）, isoquercetrin （2）, quercetin-3-O-xyloglucoside （3）, isochlorogenic acid A （4） and isochlorogenic acid C （5） by spectroscopic analyses and chemical evidence. Compounds 3-5 were isolated for the first time from this species.