目的研究蒙桑Morus mongolica茎皮中的Diels-Alder型加合物化学成分。方法利用硅胶柱色谱、RP-18及Sephadex LH-20进行分离纯化，根据各种光谱技术进行结构鉴定。结果分离得到6个Diels-Alder型加合物，分别为阿尔本F(albanin F,Ⅰ)、桑酮L(kuwanon L,Ⅱ)、双桑辛素(dimoracin,Ⅲ)、桑酮J(kuwanon J,Ⅳ)、桑呋喃J(mulberrofuran J,Ⅴ)、桑呋喃Q(mulberrofuran Q,Ⅵ)。结论化合物Ⅱ、Ⅲ、Ⅴ为首次从该种植物分得。抗氧化筛选结果表明,化合物Ⅳ~Ⅵ具有抗氧化活性。

Objective To study the Diels-Alder type adducts in the stem bark of Morus mongolica.Methods The compounds were isolated and purified by silic gel column chromatography,RP18 and Sephadex LH-20.The structures were identified by various spectral evidence.Results Six Diels-Alder type adducts were obtained and they were albanin F(Ⅰ),kuwanon L(Ⅱ),dimoracin(Ⅲ),kuwanon J(Ⅳ),mulberrofuran J(Ⅴ),mulberrofuran Q(Ⅵ).Conclusion Compounds Ⅱ,Ⅲ,and Ⅴ are isolated from the plant for the first time and compounds ⅣⅥ show the anti-oxidation activities.

国家自然科学基金资助项目(20432030,20572133)