摘要
对黄素馨Jasminum giraldii根皮的化学成分进行研究。采用正相硅胶、Sephadex LH-20以及Rp—HPLC制备柱色谱法,从黄素馨乙醇提取物的乙酸乙酯萃取部位中分离得到10个化合物,通过MS和NMR等谱学方法,鉴定结构为(+)-棒皮树脂醇(1),(+)-丁香树脂醇(2),(+)-丁香脂素4′-O-β-D-葡萄糖苷(3),齐墩果酸(4),3-甲氧基4-羟基桂皮醛(5),芥子醛(6),3,5-二甲氧基对羟基苯甲醛(7),1-(4-甲氧基苯基)乙醇(8),反式桂皮酸(9),4-(1-甲氧基乙基)苯酚(10)。化合物1~3,5~8以及10为首次从素馨属植物中分离得到;化合物4和9为首次从该植物中分离得到。采用DPPH自由基清除法对分离得到的化合物进行抗氧化活性的筛选。结果显示,化合物1显示出强的自由清除能力(IC50为55.1μmol·L^-1),活性强于维生素C(IC50为59.9μmol·L^-1),化合物2显示中等强度自由清除能力(IC50为79.0μmol·L^-1),活性弱于维生素C,但强于2,6-二羟丁基对甲酚(IC50为236μmol·L^-1)。
Abstract:Ten compounds were isolated from the barks of Jasminum giraldii by means of various of chromatographic techniques such as silica gel, Sephadex LH-20 and Rp-HPLC. Their structures were identified by spectroscopic data analysis as (+)-medioresinol(1),(+)-syringaresinol(2), syringaresinol-4′-O-β-D-glucopyranoside(3), oleanic acid(4), 3-methoxy-4-hydroxy-trans-cinnamaldehyde(5), trans-sinapaldehyde(6), syringaldehyde(7), 1-(4-methoxy -phenyl)-ethanol(8), trans-cinnamic acid(9), and 4-(1-methoxyethyl)-phenol(10). Among them, compounds 1-3, 5-8 and 10 were isolated from the J. genus for the first time and compounds 4 and 9 were obtained from J. giraldii for the first time. In the DPPH free radical scavenging assay, compound 1 exhibited significant activity(IC50 55.1 μmol·L^-1), compared with vitamin C(IC50 59.9 μmol·L^-1); and compound 2 showed moderate activity(IC50 79.0 μmol·L^-1), compared with 2, 6-di-tert-butyl-4-methylphenol(IC50 236 μmol·L^-1).
出处
《中国中药杂志》
CAS
CSCD
北大核心
2014年第11期2029-2033,共5页
China Journal of Chinese Materia Medica
基金
国家重点基础研究发展计划(973)项目(2010CB535002)
陕西省中医管理局重点实验室项目(09SYS01)
关键词
黄素馨
化学成分
木脂素
苯丙素
DPPH自由基清除法抗氧化活性
Jasminum giraldii
chemical constituents
lignans
phenylpropanoids
antioxidant activity of DPPH free radical scavenging assay