Bioassay-guided screening and isolation of α-glucosidase and tyrosinase inhibitors from leaves of Morus alba
作者:Zhenzhong Yang、Yingchao Wang、Yi Wang、Yufeng Zhang
DOI:10.1016/j.foodchem.2011.09.040
日期:2012.3
In this study, bioassay-guided fractionation of extracts from the leaves of Morus alba L. led to the isolation of 15 bioactive constituents with α-glucosidase and tyrosinase inhibitory activities, among which prenylated stilbenes were proved to be a new group of α-glucosidase inhibitors apart from iminosugars derived from Morus alba. Their structures were identified on the basis of extensive spectroscopic
在这项研究中,桑树叶片提取物的生物测定指导分馏导致了15种具有α-葡萄糖苷酶和酪氨酸酶抑制活性的生物活性成分的分离,其中早戊二烯基芪被证明是一类新的α-葡萄糖苷酶。从衍生自亚氨基糖开抑制剂桑白皮。根据广泛的光谱分析和化学证据,以及与文献数据进行比较,确定了它们的结构。其中,化合物(2R)/(2S)-Euchrenone a 7(6a / 6b),Chalcomoracin(7),Moracin C(8), Moracin D(9)和Moracin N(10)表现出显着程度的α-葡萄糖苷酶抑制活性,IC 50分别为6.28、2.59、4.04、2.54和2.76μM,而(2R)/(2S)-Euchrenone a 7(6a / 6b),Moracin N(10),槲皮素(13),Norartocarpetin(14)中,(2R的相互转换的差向异构体混合物)/(2S)-7-甲氧基-8-乙基-2',4'-