[关键词]
[摘要]
从河套大黄干燥根与根茎的甲醇提取物中分得8个非蒽醌类成分。经化学和波谱方法,确定它们的结构分别为:β-谷甾醇(β-sitosterol,Ⅰ)、土大黄苷元(rhapontigeni,Ⅱ)、没食子酸(gallicacid,Ⅲ)、3-(3’,5’-二羟基-反式-肉桂酰基)-5-羟基-△5-α-吡喃酮[3-(3’,5’-dihydroxyl-trans-cinnamoyl)-5-hydroxyl-△5’-α-pyranone,Ⅳ]、胡萝卜苷(daucosterol,Ⅴ)、piceatannol-3’-O-β-D-glucopyranoside(Ⅵ)、土大黄苷(rhaponticin,Ⅶ)和蔗糖(Ⅷ)。其中Ⅳ为一新化合物,命名为波叶素(rheumin)。Ⅰ、Ⅲ、Ⅴ、Ⅵ和Ⅷ系首次从该植物中获得。
[Key word]
[Abstract]
From the methanolic extract of stem and root of Rheum hotaoense C.Y.Cheng et C.T.Kao,eight non-anthraquinones were isolated.Their structures were identified by chemical and spectroscopic methods,as:(3-sitosterol(I),rhapontigenin(ll),gallic acid(11),3-(3',5'-dihydroxy-trans-cinnamoyl)-5-hy-droxy-z},5-a-pyranone(N),daucosterol(V),piceatannol-3'-O-(3-D-glucopyranoside(Vl),rhaponticin(V1)and sucrose (Vllf ).I、1Q、V、VI、V1 were obtained from this plant for the first time and N is a new compound and named rheumin.
[中图分类号]
[基金项目]