Chemical constituents of the Vietnamese plants Dalbergia tonkinensis Prain and Cratoxylum formosum (Jack) Dyer in Hook and their DPPH radical scavenging activities
作者:Ninh The Son、Mari Kamiji、Tran Thu Huong、Miwa Kubo、Nguyen Manh Cuong、Yoshiyasu Fukuyama
DOI:10.1007/s00044-019-02383-9
日期:2019.9
the leaves and roots of Dalbergia tonkinensis led to the isolation of a new isoflavone glycoside derivative, isocaviunin 7-O-β-D-apiofuranosyl-(1 → 6)-β-D-glucopyranoside (1), and a new scalemic sesquiterpene lactone, 3,7-dimethyl-3-vinylhexahydro-6,7-bifuran-3(2H)-one (2), along with the previously known compounds 3-16, and nine other known compounds 17-25 were isolated from the leaves of Cratoxylum
叶和根的植物化学物质调查黄檀山豆根导致了新的异黄酮糖苷衍生物的分离,isocaviunin 7- ö - β -D- apiofuranosyl-(1→6) - β - d吡喃葡萄糖苷(1),和一个新消旋倍半萜内酯,3,7-二甲基-3- vinylhexahydro -6,7- bifuran-3(2 ħ) -酮(2),与先前已知的化合物一起3-16等九个已知化合物17-25分别从Cratoxylum formosum的叶子中分离。通过1D和2D-NMR分析以及MS光谱数据阐明了分离出的化合物的化学结构。结果表明类黄酮是两种植物的特征。在DPPH自由基清除试验中,(3 R)-甾醇(5)和异槲皮素(24)具有最强的抗氧化IC 50值,分别为42.20 µg / mL和45.63 µg / mL,它们的值与阳性对照儿茶素(IC 50 42.98 µg / mL)。