高良姜根茎中的一个新糖苷

目的对高良姜(Alpinia officinarum Hance)根中的糖苷类成分进行分离和结构鉴定。方法通过大孔树脂、聚酰胺和凝胶反复柱色谱分离得到糖苷类化合物;利用多种波谱技术鉴定其化学结构。结果分离鉴定了2个糖苷类化合物,其结构分别为4′-羟基-2′-甲氧基苯酚-β-D-{6-O-［(4″-羟基-3″,5″-二甲氧基)苯甲酸］}-吡喃葡糖苷(I)和正丁基-β-D-吡喃果糖苷(II)。结论化合物I为新化合物,命名为高良姜苷A,化合物II为首次从该属植物中分离得到。     

中药金樱子根中三萜类化学成分研究

利用多种色谱分离方法对金樱子根中的化学成分进行分离和纯化,并根据化合物的理化性质和光谱分析进行结构鉴定。从金樱子根的乙酸乙酯及丙酮提取部位中分离得到了12个三萜类化学成分,分别鉴定为:(2R,19R)methyl 2-acetyloxy-19-hydroxyl-3-oxo-urs-12-en-28-carboxylate(1)、坡模酮酸(2)、18,19-seco,2α,3α-dihydroxy-19-oxo-urs-11,13(18)-dien-28-oic acid(3)、swinhoeic acid(4)、千花木酸(5)、2α,3β,19α-trihydroxy-24-oxo-urs-12-en-oic acid(6)、委陵菜酸(7)、阿江榄仁尼酸(8)、1β-羟基蔷薇酸(9)、quadranosideⅧ(10)、高山地榆苷(11)、rubuside B(12)。其中,化合物1~4,6,9,11~12为首次从金樱子中分离得到;化合物2~4,6,11~12为首次从蔷薇属分离得到。     

Protein Tyrosine Phosphatase 1B Inhibitors from Plantago asiatica

Objective To identify the active compounds for protein tyrosine phosphatase 1B(PTP1B) from the seeds of Plantago asiatica.Methods Bioassay-guided fractionation resulted in the isolation of iridoid glucosides(1-5) with PTP1B inhibitory activity.Results Five compounds were identified as desacetylhookerioside(1),melittoside(2),geniposidic acid(3),10-O-acetyl-geniposidic acid(4),and alpinoside(5).Conclusion Isolated compounds 35 inhibit PTP1B with IC50 values ranged from(16.3 ± 1.1) to(19.8 ± 1.2) μmol/L.     

Protein Tyrosine Phosphatase 1B Inhibitors from Plantago asiatica

Objective To identify the active compounds for protein tyrosine phosphatase 1B (PTP1B) from the seeds of Plantago asiatica. Methods Bioassay-guided fractionation resulted in the isolation of iridoid glucosides (1－5) with PTP1B inhibitory activity. Results Five compounds were identified as desacetylhookerioside (1), melittoside (2), geniposidic acid (3), 10-O-acetyl-geniposidic acid (4), and alpinoside (5). Conclusion Isolated compounds 3－5 inhibit PTP1B with IC50 values ranged from (16.3 ? 1.1) to (19.8 ? 1.2) μmol/L.