Antidiabetic Principles of Natural Medicines. II. Aldose Reductase and .ALPHA.-Glucosidase Inhibitors from Brazilian Natural Medicine, the Leaves of Myrcia multiflora DC. (Myrtaceae): Structures of Myrciacitrins I and II and Myrciaphenones A and B.
作者:Masayuki YOSHIKAWA、Hiromi SHIMADA、Norihisa NISHIDA、Yuhao LI、Iwao TOGUCHIDA、Johji YAMAHARA、Hisashi MATSUDA
DOI:10.1248/cpb.46.113
日期:——
II, and new acetophenone glucosides, myrciaphenones A and B, were isolated together with several known compounds such as five flavonol glycosides, myricitrin, mearnsitrin, quercitrin, desmanthin-1, and guaijaverin. The structures of new compounds were determined on the basis of physicochemical and chemical evidence. The principal components of this natural medicine including new glucosides, myrciacitrin
发现来自巴西天然药物Myrcia multiflora DC。的叶子的甲醇提取物和乙酸乙酯可溶部分已被用作抗糖尿病的特殊药物,它们对醛糖还原酶和α-葡萄糖苷酶以及对增加了蔗糖负荷大鼠和四氧嘧啶诱导的糖尿病小鼠的血清葡萄糖水平。从乙酸乙酯可溶部分中,分离出新的黄烷酮葡糖苷,Mycciacitrins I和II,以及新的苯乙酮葡糖苷Myrciaphenones A和B,以及几种已知的化合物,如5种黄酮醇苷,杨梅素,美斯美汀,槲皮素,desmanthin-1,和番石榴。根据理化证据确定了新化合物的结构。这种天然药物的主要成分包括新的葡萄糖苷,