地枫皮,假地枫皮,大八角3种植物挥发油化学成分对比分析

本文用毛细管气相色谱、气相色谱／质谱／计算机等现代仪器分析技术，对地以、假地枫皮，大八角３种植物以挥发油化学成分进行了对比分析研究，用毛细管色谱从这３种植物挥发油中各分离出８０多个以上的组分，共确认了其中的４５种成分，所鉴定的 分均占各挥发油色谱总馏出锋面积的８０％以上。研究结果表明，这３种植物挥发油存在着较大的差异。     

Isolation and Identification of Bioactive Constituents from Stem Barks of Illicium difengpi

Objective To isolate and identify bioactive constituents from the stem barks of Illicium difengpi.Methods The chemical constituents were isolated and purified by repeated silica gel,Sephadex LH-20,recrystallization,and preparative HPLC techniques.The structures of the compounds were identified on the basis of spectral data including NMR,MS,and IR.Results Two sesquiterpene lactones,majucin(1)and anisatin(2),two steroids,β-sitosterol(3)and daucosterol(4),three carboxylic acids,2-ethyldecanoic acid(5),shikimic acid(6),and 3,4-dihydrobenzoic acid(7),and a flavonoid,quercetin(8),were successively isolated from the stem barks of I.difengpi.Conclusion Apart from compound 3,other seven compounds are reported in this plant for the first time.The results suggested that the current studies on I.difengpi is still far from being well known and therefore more studies need to be done for better understanding of this plant.     

100种中药材抗氧化活性的筛选

研究了100种中药材的抗氧化活性,并测定它们的乙醇提取液对1,1–二苯基–2–苦肼基自由基(DPPH)的清除作用。其中虎杖,土荆皮,地枫,地榆等4种中药材在浓度为0.25mg/ml时对DPPH的清除作用均超过50%,具有较强的抗氧作用。尤其是地榆在浓度为0.25mg/ml时,队DPPH的清除作用高达78%。     

中药地枫皮的化学成分研究

从中药地枫皮(Illicium difengpi K.I.B.et K.I.M.)中分离出3个化合物,经理化常数和波谱数据解析,分别鉴定为地枫皮素(Ⅰ),厚朴酚(Ⅱ)和β-谷甾醇(Ⅲ)。化合物Ⅰ为一新化合物,其化学结构为4-allyl-2,6-dirnethoxyphenyol cinnamate,命名为地枫皮素(difengpin)。化合物Ⅱ为首次从八角属植物中分离得到。     

地枫皮果挥发油的气相色谱-质谱分析

用气相色谱-质谱法从地枫皮果挥发油中共检出63个成分,鉴定了其中的54个化合物。     

地枫皮的化学成分研究

从中药地枫皮（Illicium difengpi K.I.B et K.I.M.)中分离出3个化合物，经理化常数和波谱数据解析，分别鉴定为地枫皮素（1），厚朴酚（2）和β－谷甾醇（3），化合物1为一新化合物，其化学结构为4-allyl-2,6-dimethoxy-phenol cinnamate,命名为地枫皮素（difengpin)。