毛鱼藤根中的一个新神经酰胺(英文)

目的:对毛鱼藤根化学成分进行分离和鉴定。方法:通过多种层析方法分离纯化化合物,用波谱解析方法进行结构鉴定。结果:从毛鱼藤根中分离到4个脂质化合物,包含3个神经酰胺:(2S,3S,4R,8E)-2N-[(2′R,3′)-2′,3′-dihydroxy-hexacosanoyl]-1,3,4-trihydroxy-8-octadecene(1),(2S,3S,4R,8E)-2N-[(2′R)-2′-hydroxyhexacosanoyl]-1,3,4-trihydroxy-8-octadecene(2),1-O-β-D-glucopyranosyl-(2S,3S,4R,8E)-2N-[(2′R)-2′-hydroxytetracosanoyl]-3,4-dihydroxy-8-octadecene(3),和1个多羟基十八烷酸:12,13,15-trihydroxy-9-octadecenoicacid(4)。结论:化合物1为新化合物,也是首个C-3′有羟基取代的新神经酰胺。化合物2-4为鱼藤属植物中首次发现的化合物。     

毛果鱼藤中黄酮类化学成分研究

综合运用硅胶柱色谱、SephadexLH-20、聚酰胺柱色谱、半制备HPLC以及重结晶等方法对毛果鱼藤中黄酮类化学成分进行分离纯化,并通过质谱、核磁共振谱等方法鉴定各单体化合物的结构。最后从毛果鱼藤的乙酸乙酯部位分离得到9个黄酮类化合物,依次为香叶木素(1),3, 3'-二甲醚-槲皮素(2),阿弗洛莫生(3),6, 3'-dihydroxy-7, 4'-dimethoxyisoflavone(4),飞机草素(5),7, 3'-dihydroxy-8, 4'-dimethoxyisoflavone(6),6, 4'-dihydroxy-7, 3'-dimethoxyisoflavone(7),5, 7, 4'-trihydroxy-3, 3', 5'-trimethoxyflavone(8),alpinumisoflavone(9)。所有化合物均为首次从该植物中分离得到。运用MTT法进行体外抗肿瘤实验,结果表明化合物 2 显示一定的抑制细胞增殖活性。     

A new acylated flavonol glycoside from Derris triofoliata

A new acylated flavonol glycoside, kaempferol 3-O-[(6″″-feruloyl)-β-D-glucopyranosyl-(1 → 3)]-[α-L-rhamnopyranosyl-(1 → 6)]-β-D-glucopyranoside and two known cyclolignan glycosides, (+)-lyoniresinol-3α-O-β-D-glucopyranoside and ( ? )-lyoniresinol-3α-O-β-D-glucopyranoside were isolated from n-BuOH extracts of the aerial parts of Derris triofoliata, their structures were determined from spectroscopic and chemical evidences.     

Derris scandens Benth extract potentiates radioresistance of Hep-2 laryngeal cancer cells

The use of herbal products as radiosensitizers is a promising approach to increase the efficacy of radiotherapy. However, adverse effects related to the use of herbal medicine on radiotherapy are not well characterized. The present study concerns the impact of Derris scandens Benth extract on the radiosensitivity of Hep-2 laryngeal cancer cells. Pretreatment with D. scandens extract prior to gamma irradiation significantly increased clonogenic survival and decreased the proportion of radiation-induced abnormal nuclei of Hep-2 cells. Furthermore, the extract was found to enhance radiation-induced G2/M phase arrest, induce Akt activation, and increase motility of Hep-2 cells. The study thus indicated that D. scandens extract potentiates radioresistance of Hep-2 cells, further demonstrating the importance of cellular background for the adverse effect of D. scandens extract on radiation response in a laryngeal cancer cell line.     

泰国产攀援鱼藤的异黄酮苷成分

目的： 对泰国产攀援鱼藤［Derris scandens (Roxb.) Benth］地上部分的化学成分进行分离、鉴定。方法： 采用各种层析色谱技术进行分离。从攀援鱼藤中分离得到2个化合物,用IR,UV,MS,¹HNMR,¹³CNMR,²DNMR光谱鉴定化合物。结果： 经光谱鉴定化合物结构为： 4′-甲氧基－异黄酮-7-O-［α-L-鼠李吡喃糖基(1→6)］-β-D-葡萄吡喃糖苷(I)和4′,8-二甲氧基-异黄酮-7-O-［α-L-鼠李吡喃糖基(1→6)］-β-D-葡萄吡喃糖苷(II), 分别命名为攀援鱼藤苷甲(derriscanoside A)和攀援鱼藤苷乙(derriscanoside B)。结论： 化合物(I), (II)为新的异黄酮苷类化合物。     

反相高效液相色谱法测定毛鱼藤中鱼藤酮的含量

目的:建立以反相高效液相色谱法测定毛鱼藤中鱼藤酮含量的方法。方法:以ZORBAX Eclipse XDB-C18(5μm,4.6×150mm)色谱柱为固定相;乙腈:0.1%磷酸溶液(48:52,v/v,pH2.6)为流动相;流速1.0mL/min;柱温40.0℃;检测波长299nm。结果:鱼藤酮在浓度为30~50mg/L范围内,其峰面积与浓度线性关系良好,线性方程为A=20.7311C-0.3616(r=0.9998),平均加样回收率为100.74%,RSD为0.86%。结论:本方法操作简便、快速,结果准确,可用于毛鱼藤中鱼藤酮的含量测定。     

三叶鱼藤的鱼藤酮化学成分

从三叶鱼藤的乙酸乙酯提取部位分离得到五个鱼藤酮类化合物,分别为dehydrodeguelin,dehydrorote-non,12a-hydroxy rotenone,tephrosin,12-hydroxyrot-2′-enonic acid。以上化合物均为从该植物中首次分离得到。     

Isolation and characterization of a new bioactive isoflavone from Derris eriocarpa

Derris eriocarpa How is an important medicinal plant, which is used as Zhuang ethnomedicine and Dai ethnomedicine to treat various diseases. One new compound, 3′,4′-di-O-methylene-5-hydroxy-7-methoxy-6-isopentenyl isoflavone (1) and a known synthetic but new naturally occurring compound trans-3,4,5-trimethoxy-4′-isopentenyloxyl-stilbene (2), together with five known compounds, 5,7-dimethoxy-6-(3-methyl-2-butenyl)-4′-hydroxyl isoflavones (3), robustone (4), trans-3,4,5,4′-tetramethoxy-stilbene (5), robustic acid (6), and robustin (7) were isolated from the stem of D. eriocarpa. Spectroscopic analysis revealed the chemical structures of compounds 1–7.. Compounds 1 and 3 exhibited significant scavenging activities against 1,1-diphenyl-2-picrylhydrazyl radical and superoxide anions. Compounds 1–3 exhibited potent antiproliferative activity on Hela cells.     

响应曲面法优化毛果鱼藤总生物碱的提取工艺及其抑菌活性

目的:利用响应曲面分析法优化毛果鱼藤总生物碱的提取工艺,并检测其抑菌活性。方法:以毛果鱼藤为原料,采用微波提取法,设计单因素实验,分别考察了料液比、乙醇体积分数、提取时间、微波提取功率、提取次数5个单因素对毛果鱼藤总生物碱提取效果的影响;采用响应曲面法优化毛果鱼藤总生物碱的提取工艺,提高总生物碱的提取效率,并考察总生物碱的体外抑菌作用。结果:毛果鱼藤总生物碱的最佳提取工艺条件为微波功率400 W,提取温度为70℃,料液比为1∶23,乙醇体积分数为70%,提取时间为23 min,在此条件下,以盐酸小檗碱计,总生物碱提取率为0.107 7 mg·g-1;抑菌实验表明,毛果鱼藤总生物碱对金黄色葡萄球菌有一定的抑菌作用。结论:微波法提取生物碱工艺方法科学、稳定,且生物碱具有良好的抑菌作用。     

Novel N-containing rotenoid and seco-rotenoid from the root of Derris elliptica

Two new rotenoids, 2-hydroxy-5-aminorotenonone (1) and elliptoic acid (2), were isolated from the roots of Derris elliptica collected in Guangdong Province, China. Their structures were established by extensive spectral analysis. Compound 1 is the first N-containing rotenoid and compound 2 is the third rotenoid with the cleavage of C(12)–C(12a).