流苏龙胆中的酮类成分研究

目的研究流苏龙胆Gentiana panthaica中的酮类成分。方法采用多次的硅胶柱色谱法分离纯化,并通过理化性质和光谱与波谱分析技术鉴定其化学结构。结果从流苏龙胆中分离得到6个酮类化合物,分别鉴定为:1-羟基-2,3,4,7-四甲氧基酮(Ⅰ)、1,8-二羟基-3,5-二甲氧基酮(Ⅱ)、1-羟基-2,3,4,5-四甲氧基酮(Ⅲ)、1-羟基-2,3,7-三甲氧基酮(Ⅳ)、1-羟基-2,3,5-三甲氧基酮(Ⅴ)和1,7-二羟基-2,3,5-三甲氧基酮(Ⅵ)。结论6个化合物均为首次从该植物中分离得到。     

青藏高原龙胆科植物花中微量元素之因子分析研究

目的:综合评价青藏高原龙胆科植物花中6种微量元素.方法:采用因子分析方法对青藏高原龙胆科植物花中的微量元素含量数据进行分析,找出了龙胆科植物花中Ca、Mg、Cu、Fe、Mn、Zn 6种微量元素之间的关系,运用化学计量学方法,结合MATLAB2010软件,对青藏高原龙胆科植物花中微量元素和中药功效进行研究.结果:第1公共...     

流苏龙胆中的(口山)酮类成分研究

目的研究流苏龙胆Gentiana panthaica中的仙酮类成分。方法采用多次的硅胶柱色谱法分离纯化，并通过理化性质和光谱与波谱分析技术鉴定其化学结构。结果从流苏龙胆中分离得到6个[口山]酮类化合物，分别鉴定为：1-羟基-2，3，4，7-四甲氧基[口山]酮（Ⅰ）、1，8-二羟基-3，5-二甲氧基[口山]酮（Ⅱ）、1-羟基-2，3，4，5-四甲氧基[口山]酮（Ⅲ）、1-羟基-2，3，7-三甲氧基[口山]酮（Ⅳ）、1-羟基-2，3，5-三甲氧基[口山]酮（Ⅴ）和1，7-二羟基-2，3，5-三甲氧基[口山]酮（Ⅵ）。结论6个化合物均为首次从该植物中分离得到。     

薄层比色法测定獐牙菜中齐墩果酸的含量

应用薄层比色法对獐牙菜中齐墩果酸的含量进行测定。样品经氯仿提取，展开剂为二氯甲烷∶甲醇（９５∶５），样液用香草醛和高氯酸试剂显色，测定结果獐牙菜中游离齐墩果酸的含量为０．５９％。     

Antioxidant phenolic glucosides from Gentiana piasezkii

An extract of Gentiana piasezkii afforded a new arbutin derivative 6′-O-vanilloylarbutin (1) and a new flavone-C-glucoside 7-O-feruloylorientin (2), together with four known flavonoids lutonarin (3), saponarin (4), isoorient (5) and luteolin (6). Their structures were established based on spectroscopic methods including 2D NMR (COSY and gHMBC) techniques. Compounds 1, 2, 5 and 6 were evaluated for the antioxidant activity in the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay system.     

New triterpenoid saponins from the aerial parts of Comastomapedunculatum

Three new saikosaponin analogs, comastomasaponins I–K (1–3), were isolated from the aerial portions of Comastomapedunculatum. The structures of these compounds were elucidated on the basis of spectroscopic data analysis, and their nitric oxide production inhibitory activity was evaluated invitro.     

A new compound from Gentianopsis paludosa

A new compound, named gentianopfluorenone (1), along with three known compounds,1-O-β-d-glucopyranosyl-5-hydroxy-3-methoxyxanthone (2), 1-O-[β-d-xylopyranosyl-(1 → 6)-β-d-glucopyranosyl]-7,8-dihydroxy-3–methoxyxanthone (3), and apigenin (4), were isolated from the whole herb of Gentianopsis paludosa. On the basis of spectral and chemical evidence, the structure of 1 was elucidated as 4,4a,6-trihydroxy-5-methoxy-fluoren-2,9-dione. Compounds 2–4 were isolated from the plant for the first time.     

大籽獐牙菜中大籽獐牙菜甙的结构

本文报道从大籽獐牙菜Swertia macrosperma C.B.Clark的全草中分离得到的另外四个化合物Ⅰ～Ⅳ。经光谱及化学方法鉴定,化合物Ⅰ是一种咖啡酸双糖酯类化合物,其结构为反式咖啡酸-1-O-芦丁糖酯(trans caffeic acid-1-O-rutinose ester),系首次从天然界得到的一种新化合物,命名为大籽獐牙菜甙(swertiamacroside);化合物Ⅱ～Ⅳ为已知的(口山)酮衍生物,分别鉴定为芒果甙(mangiferin,Ⅱ),bellidifodin(Ⅲ)及bellidifodin-8-O-β-D-glucopyranoside(Ⅳ)。     

Three new xanthones from Swertia bimaculata and their anti-5α-reductase activity

Three new xanthones (1–3), together with five known ones (4–8), were isolated from whole herb of Swertia bimaculata. Their structures were established on the basis of detailed spectroscopic analysis (1D- and 2D-NMR, HRESIMS, UV, and IR) and comparison with data reported in the literature. New isolates were evaluated for their anti-5α-reductase activity. The results revealed that all new compounds showed weak activity with reductase inhibitions of 40.5 ± 2.8, 38.6 ± 2.5, and 48.9 ± 3.0%, respectively.     

丽江獐牙菜化学成分及抗乙肝病毒活性研究

利用各种色谱方法对丽江獐牙菜Swertia delavayi全草的化学成分进行提取、分离和纯化,得到15个单体化合物,通过波谱数据分析(MS,¹H,¹³C-NMR) 对其结构进行鉴定,分别为红白金花内酯(erythrocentaurin, 1)、红白金花内酯缩二甲醇(erythrocentaurin dimethylacetal, 2)、獐牙菜苷(sweroside, 3)、獐牙菜苦苷(swertiamarin, 4)、龙胆苦苷(gentiopicroside, 5)、贵州獐牙菜苷A(swertiakoside A, 6)、2'-O-乙酰基獐牙菜(2'-O-acetylswertiamarin, 7)、4'-O-[(Z)-对香豆酰基]獐牙菜苦苷(4'-O-[(Z)-coumaroyl]- swertiamarin, 8)、1,5,8-三羟基-3-甲氧基 NFDE8 酮(1,5,8-trihydroxy-3-methoxyxanthone, 9)、8-O-β-D-吡喃葡萄糖-1-羟基-2,3,5-三甲基 NFDE8 酮(8-O-β-D-glucopyranosyl-1- hydroxy-2,3,5-trimethoxyxanthone, 10)、8-O-[β-D-吡喃木糖-(1→6)-β-D-吡喃葡萄糖]-1羟基-2,3,5-三甲氧基 NFDE8 酮(8-O-[β-D-xylopyranosyl-(1→6)-β-D-glucopyranosyl]-1-hydroxy-2,3,5-methoxyxant-hone, 11)、异牡荆素(isovitexin, 12)、齐墩果酸(oleanolic acid, 13)、β-谷甾醇(β-sitosterol, 14) 和胡萝卜苷(daucosterol, 15),其中化合物 1~4, 7~11, 13 是首次从丽江獐牙菜中分离得到。在体外利用HepG 2.2.15细胞系对得到的单体化合物进行了抗乙肝病毒活性测试,其中化合物 1,2,6,7,9和12 具有明显的抑制HBV DNV的复制活性,其IC₅₀值为0.05~ 1.46 mmol·L^-1。