目的研究广西产灰毛大青干燥全株的化学成分。方法采用硅胶及凝胶柱色谱法进行分离,并运用化学及波谱学方法对分得的成分进行了结构鉴定。结果分离并鉴定出其中7个化合物,分别为羽扇豆醇(lupeol,Ⅰ)、α-香树脂醇十一酸酯(α-amyrin 3-undecanotate,Ⅱ)、羽扇豆醇乙酸酯(lupeol acetate,Ⅲ)、羽扇豆醇棕榈酸酯(lupeol 3-palmitate,Ⅳ)、melastomic acid(Ⅴ)、β-香树脂醇乙酸酯(β-amyrin acetate,Ⅵ)、桦木酸(betulinic acid,Ⅶ)。结论化合物Ⅱ为新化合物,化合物Ⅳ～Ⅵ为首次从大青属植物中分得。

Objective To investigate the chemical constituents in the whole plant of Clerodendrum canescens. Methods The compounds were isolated by column chromatography over silica gel or Sephadex LH-20 gel and their structures were elucidated by chemical and spectroscopic methods. Results Seven triterpenoids were isolated and identified as: lupeol (Ⅰ), α-amyrin 3-undecanotate (Ⅱ), lupeol acetate (Ⅲ), lupeol 3-palmitate (Ⅳ), melastomic acid (Ⅴ), β-amyrin acetate (Ⅵ), betulinic acid (Ⅶ), respectively. Conclusion Among those compounds, compound Ⅱ is a new one, while compounds Ⅳ-Ⅵ are isolated from the plants of Clerodendrum Linn. for the first time.