Taxiphyllin 6′-<i>O</i>-Gallate, Actinidioionoside 6′-<i>O</i>-Gallate and Myricetrin 2″-<i>O</i>-Sulfate from the Leaves of <i>Syzygium samarangense</i> and Their Biological Activities
作者:Nabil Samy Mamdouh、Sachiko Sugimoto、Katsuyoshi Matsunami、Hideaki Otsuka、Mohamed Salah Kamel
DOI:10.1248/cpb.c14-00352
日期:——
Three new compounds were isolated from a MeOH extract of the leaves of Syzygium samarangense, one new cyanogenic glucoside, taxiphyllin 6′-O-gallate (1), one new megastigmane glucoside, actinidioionoside 6′-O-gallate (2), and one new sulfated flavonoid rhamnoside, myricetrin 2″-O-sulfate (3), together with 14 known compounds, lupeol (4), demethoxymatteucinol (5), cryptostrobin (6), betulinic acid (7), β-sitosterol glucoside (8), 2R-prunasin (9), myrciaphenone A (10), 1-feruloyl-β-D-glucopyranoside (11), (3S,5R,6R,7E,9S)-3,5,6,9-tetrahydroxymegastigman-7-ene (12), guaijaverin (13), myricetin 4′-methyl ether 3-O-α-L-rhamnopyranoside (14), myricetrin (15), gallic acid (16) and actinidioionoside (17). The structures of the new compounds were determined through a combination of spectroscopic, HPLC and chemical analyses.
从Syzygium samarangense叶子的甲醇提取物中分离出了三种新化合物:一种新的氰糖苷,税枝苷6′-O-没食子酸酯(1);一种新的巨大甾烷糖苷,猕猴桃苷6′-O-没食子酸酯(2);以及一种新的硫酸化类黄酮鼠李糖苷,木蓝苷2″-O-硫酸酯(3),同时还发现了14种已知化合物:齐墩果醇(4)、去甲氧基马尔图辛醇(5)、隐茉莉醇(6)、白桦酸(7)、β-谷甾醇糖苷(8)、2R-李子苷(9)、猕猴桃苷A(10)、1-对香豆酰基-β-D-葡萄糖(11)、(3S,5R,6R,7E,9S)-3,5,6,9-四羟基巨大甾烯(12)、鼠李苷(13)、木蓝苷4′-甲基醚3-O-α-L-鼠李糖苷(14)、木蓝苷(15)、没食子酸(16)及猕猴桃苷(17)。新化合物的结构通过结合谱学、HPLC和化学分析的方法确定。