[关键词]
[摘要]
目的 研究大苞鞘石斛Dendrobium wardianum的主要化学成分及部分化合物的肿瘤细胞毒活性。方法 应用多种色谱分离技术,结合半制备液相色谱对化合物进行分离纯化,通过核磁共振谱、质谱、薄层色谱对照等鉴定化合物结构;MTS法检测部分化合物的肿瘤细胞毒活性。结果 从大苞鞘石斛中分离得到16个化合物,分别鉴定为愉悦石斛素(1)、钩状石斛素(2)、反式-阿魏酸二十烷基酯(3)、反式-阿魏酸二十二烷基酯(4)、对香豆素酸二十四烷基酯(5)、4-羟基-3-甲氧基肉桂醛(6)、二氢松柏醇(7)、3,7-二甲氧基-5-羟基-1,4-菲醌(8)、3-乙氧基-5-羟基-7-甲氧基-1,4-菲醌(9)、4-甲氧基-9,10-二氢菲-2,7-二醇(10)、5,7,4'-三羟基二氢黄酮(11)、5,7,4'-三羟基-3',5'-二甲氧基二氢黄酮(12)、苜蓿素(13)、3,5,4'-三甲氧基-4-羟基联苄(14)、3,5,3'-三甲氧基-4'-羟基联苄(15)和3,3'-二甲氧基-4,5'-二羟基联苄(16)。对所得化合物3、6、8、9、11、14、15进行了肿瘤细胞毒活性筛选,其中化合物6、8有一定的体外肿瘤生长抑制活性。结论 化合物3、5、6为首次从石斛属植物中分离得到,化合物10、11、14、15为首次从大苞鞘石斛中分离得到;大苞鞘石斛活性成分有待挖掘。
[Key word]
[Abstract]
Objective To study the chemical constituents and cytotoxic activity of Dendrobium wardianum. Methods The compounds were separated and purified by various column chromatography techniques and semi-preparative liquid chromatography, and the structures were then identified by NMR, MS and TLC. And the cytotoxic activity of compounds 3, 6, 8, 9, 11, 14, 15 were detected by MTS assay. Results Sixteen compounds were isolated from D. wardianum. They were identified as amotin (1), aduncin (2), E-ferulic acid eicosyl ester (3), E-ferulic acid docosyl ester (4), tetracosyl p-coumarate (5), 4-hydroxy-3-methoxy cinnamaldehyde (6), dihydroconiferyl alcohol (7), 3,7-dimethoxy-5-hydroxy-1,4-phenanthrenequinone (8), 3-ethoxy-5-hydroxy-7- methoxy-1,4-phenanthrenequinone (9), 4-methoxy-9,10-dihydrophilic-2,7-diol (10), 5,7,4'-trihydroxy dihydroflavone (11), 5,7,4'-trihydroxy-3',5'-dimethoxy dihydroflavone (12), tricin (13), 3,5,4'-trimethoxy-4-hydroxybibenzyl (14), 3,5,3'-trimethoxy-4'-hydroxybibenzyl (15) and 3,3'-dimethoxy-4,5'-dihydroxybibenzyl (16). Compounds 6 and 8 have tumor growth inhibitory activity on tumor growth in vitro. Conclusion Compounds 3, 5, 6 are isolated from Dendrobium for the first time, and 10, 11, 14, 15 are isolated from D. wardianum for the first time. The active components of D. wardianum need to be further explored.
[中图分类号]
R284.1
[基金项目]
云南省科技专项“云南石斛产业转型升级技术研究与产业化”(2017ZF003-04)