华石斛化学成分研究Ⅱ
2020-11-02蔡彩虹谭彩银陈惠琴王昊梅文莉宋希强戴好富
蔡彩虹 谭彩银 陈惠琴 王昊 梅文莉 宋希强 戴好富


摘 要:海南特有植物华石斛(Dendrobium sinense)的化学成分和药理活性研究报道较少。为了深入研究华石斛的化学成分,该研究采用MCI小孔树脂柱色谱、硅胶柱色谱和Sephadex LH-20柱色谱等多种现代分离纯化技术,从其全草乙醇提取物的乙酸乙酯部位中分离纯化了10个化合物。结果表明:对分离纯化得到的10个化合物鉴定为罗汉松脂素(1)、4,5-二羟基-2,3-二甲氧基-9,10-二氢菲(2)、华石斛素C(3)、对甲氧基苯乙醇(4)、顺式对羟基肉桂酸乙酯(5)、对羟基苯丙酸乙酯(6)、丁香醛 (7)、3-羟基苯甲醛(8)、3,9-dihydroxy-megastigma-5-ene(9)和 (9Z,12Z)-9,12-二烯十八碳酸甲酯(10)。其中,首次从华石斛中分离得到的有化合物1、4-6、8-10。通过体外抑制乙酰胆碱酯酶活性实验发现,化合物2、4和化合物 9能够使乙酰胆碱酯酶活力下降。
关键词:华石斛,化学成分,乙酰胆碱脂酶抑制活性
中图分类号:Q946
文献标识码:A
文章编号:1000-3142(2020)09-1368-07
Abstract:As the Hainan endemic plant,Dendrobium sinense was reported rarely about their chemical constituents and pharmacological activities. In order to comprehensively study the chemical constituents of this species,various column chromatography including MCI,silica gel and Sephadex LH-20 were conducted,through which ten compounds were isolated from the ethyl acetate fraction of ethanol extraction of the whole herb. On the basis of the physical data and spectral analysis,the structures were identified as matairesinol (1),4,5-dihydroxy-2,3-dimethoxy-9,10-dihydrophenanthrene (2),dendrosinen C (3),4-methoxy-phenylethanol (4),eis-p-hydroxyl ethyl cinnamate (5),p-hydroxyphenylpropionic ethyl ester (6),syringaldehyde (7),3-hydroxybenzaldehyde (8),3,9-dihydroxy-megastigma-5-ene (9) and (9Z,12Z)-methyl octadeca-9,12-dienoate (10). Compounds 1,4-6,8-10 were obtained from this plant for the first time. The bioactivity results indicated that compounds 2,4 and 9 showed a certain acetylcholinesterase inhibitory activity.
Key words:Dendrobium sinense,chemical constituents,acetylcholinesterase (AChE) inhibitory activity
在中國,兰科(Orchidaceae)石斛属(Dendro-bium)植物的药用价值最早记载于《神农本草经》,被誉为“药中之上品”。20世纪30年代日本研究者发现了石斛碱,自此,国内外研究者陆续发现石斛属植物的化学成分主要有生物碱类、芪类、多糖类和倍半萜类化合物(王东晖等,2019)。近年来,国内外学者通过科学研究发现石斛能够清除羟基自由基、DPPH和ABTS自由基,抗氧化作用很强(魏明等,2016;唐静月等,2017);能够作为醛糖还原酶抑制剂,为治疗糖尿病性白内障提供新的方向(Wu et al.,2017);能够抑制白血病、肺癌H460、膀胱癌EJ和结肠癌Caco-2等细胞的增值,具有显著的抗肿瘤作用(朱启彧等,2013;Charoenrungruang et al.,2014;葛晓军等,2015)。此外,石斛在抗凝血、抗血栓、增强免疫力、抗突变和抗炎等方面还具有较好作用(徐悦等,2019)。……
