[关键词]
[摘要]
目的 研究白花丹Plumbago zeylanica中的酚类成分及其抗氧化活性。方法 采用硅胶柱色谱、半制备高效液相色谱及高效液相色谱进行系统分离,利用ESI-MS、1H-NMR、13C-NMR等波谱技术鉴定化合物结构;运用ABTS自由基清除法对分离得到的化合物进行抗氧化活性评价。结果 从白花丹药材中分离得到了12个化合物,分别鉴定为(±)-5,5'-dimethoxyl ariciresionl 4'-O-β-D-glucopyranoside(1)、络石苷(2)、槲皮素-3-O-β-D-半乳糖苷(3)、槲皮素-3-O-β-D-葡萄糖苷(4)、槲皮素(5)、槲皮素-3-O-α-L-鼠李糖苷(6)、山柰酚-3-O-α-L-鼠李糖苷(7)、芹菜素-6-C-β-D-葡萄糖苷(8)、木犀草素-6-C-β-葡萄糖苷(9)、polybotrin(10)、3-O-(β-D-glucopyranosyl)-1-(3',5'-dimethoxy-4'-hydroxyphenyl)-1-propanone(11)、(2E,4E,1'R,3'S,5'R,8'S)-二氢红花菜豆酸-3'-O-β-D-吡喃葡萄糖苷(12)。ABTS自由基清除实验表明,化合物3~9具有显著的总抗氧化能力。结论 12个酚类化合物均为首次从该药材中分离得到,其中黄酮类成分显示了较为显著的总抗氧化能力。
[Key word]
[Abstract]
Objective To investigate the phenolic compounds from Plumbago zeylanica and their anti-oxidant activities. Methods The phenolic compounds and their analogues were isolated and purified by silica gel column chromatography, semi-preparative HPLC, and HPLC. Their structures were identified by spectroscopy data. The isolated compounds were tested for anti-oxidant activity by ABTS assay. Results Twelve phenolic compounds were obtained and identified as (±)-5,5'-dimethoxyl ariciresionl 4'-O-β-D-glucopyranoside (1), tracheloside (2), quercetin-3-O-β-D-galactoside (3), quercetin-3-O-β-D-glucopyranoside (4), quercetin (5), quercetin 3-O-α-L-rhamnoside (6), kaempferol-3-O-α-L-rhamnoside (7), apigenin-6-C-β-D-glucopyranoside (8), luteolin 6-C-β- glucopyranoside (9), polybotrin (10), 3-O-(β-D-glucopyranosyl)-1-(3',5'-dimethoxy-4'-hydroxyphenyl)-1-propanone (11), and (2E,4E,1'R,3'S,5'R,8'S)-dihydrophaseic acid-3'-O-β-D-glucopyranoside (12). The anti-oxidant activity experiment showed that compounds 3-9 displayed significant anti-oxidative activities. Conclusion All of the twelve phenolic compounds are isolated from this plant for the first time. The isolated flavones 3-9 displayed significant anti-oxidative activities.
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[基金项目]
国家自然科学基金资助项目(81560632);江西省教育厅科学技术研究项目青年项目(GJJ150122);江西省卫生计生委科技计划项目(20175135);江西省卫计委中医药科技计划项目(2017A299)