鼠李皮

We investigated constituent of triterpenoid saponins ofAlbizzia, two new compounds together with two known compounds were isolated from Albizzia julibrissin Durazz. by using column chromatography (macroreticular resin, silica gel, Sephadex gel, reverse phase silica gel),preparative HPLC methods et al.On the basis of spectroscopic analysis, including IR,ESI-MS,~1H-NMR,~(13)C-NMR,HMBC,HMQC,~1H-~1HCOSY and chemical methods, the structure of two new compounds were identified as 3 - O -[β-D-xylopyranosyl(1→2)-β-D-fucopyranosyl (1→6)-β- D -2- deoxy - 2 - acetoamidoglucopyranosyl] -21-O-[(6S)-2- trans- 2,6-dimethyl - 6 - O-β- D - quinovopyranosyl -2,7- octadienoyl] - acacic acid- 28 - O-β-D-glucopyranosyl(1→3)[α-L-arabinofuranosyl(1→4)]-α-L-rhamnopyranosyl(1→2)-β-D-glucopyranoside acacic acid 3- O -β- D- glucopyranosy(1→3)-β- D- fucopyranosl(1→6) [β-D- xylopyranosyl (1→2)]-β-D-glucopyranoside ;two known compounds were acacic acid lactone 3- O -β-D- xylopyranosyl-(1→2)-β-D-fucopyranosl (1→6)- 2-deoxy -2 -acetoamido -β-D- glucopyranoside ; acacic acid lactone 3- O-β-D-xylopyranosyl(1→2)-α-L- arabinopyranosl (1→6)- 2- deoxy - 2- acetoamido -β-D-glucopyranoside . The study lays chemical foundation and chemical reference substance for enhancing quality standard of Albizzia julibrissin Durazz.

本研究论文在综述国内外对合欢属Albizzia三萜皂苷化学成分和药理作用研究进展的基础上，利用传统植化分离手段和现代分离技术，包括大孔树脂、硅胶、葡聚糖凝胶、反相硅胶等柱色谱，制备高效液相色谱法等技术从中药合欢皮中分离得到了4个化合物，其中，2个新化合物和2个己知化合物，并进一步通过现代分析技术IR，ESI-MS，~1H-NMR，~(13C-NMR，HMBC，HMQC，~1H-~1HCOSY等和化学方法鉴定了2个新化合物的结构分别是：3-O-[β-D-吡喃木糖基(1→2)-β-D-吡喃夫糖基(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖基]-21-O-[(6S)-2-反式-2，6-二甲基-6-O-β-D-吡喃鸡纳糖基-2，7-辛二烯酸基]-金合欢酸-28-O-α-L-呋喃阿拉伯糖基(1→4)[β-D-吡喃葡萄糖基(1→3)]-α-L-吡喃鼠李糖基(1→2)-β-D-吡喃葡萄糖苷，金合欢酸3-O-β-D-吡喃葡萄糖基(1→3)-β-D-吡喃夫糖基(1→6)[β-D-吡喃木糖基(1→2)]-β-D-吡喃葡萄糖苷；2个已知化合物结构分别是：金和欢酸内酯3-O-β-D-吡喃木糖基(1→2)-β-D-吡喃夫糖基(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖苷，金和欢酸内酯3-O-β-D-吡喃木糖基(1→2)-α-L-吡喃阿拉伯糖基(1→6)-β-D-2-去氧-2-乙酰氨基吡喃葡萄糖苷。

Objective To observe the effects of quercetin and isorhamnetin on the oxidative modification of very low density lipoprotein.

目的观察槲皮素及异鼠李素对Cu2+介导的极低密度脂蛋白氧化修饰的影响。

And rhamnose can be achiev ed by micro-transformation of rutinn in this process of fermentation.

过与槐米共发酵，能有效转化芦丁，且转化产物为槲皮素、鼠李糖。

Sixteen compounds were separated from 80% ethanol extract of Plant A, they were:-lariciresinol,-isolariciresinol,-isolariciresinol 9-O-β-D-glucopyranoside, tanegoside B, apiginin, apigenin 7-O-β-D-glucoside, apigenin 7-O-β-neospheroside, quercetin 3-O-β-D-glucopyranoside, 1, 7-dihydroxy-3, 4-dimethoxyxanthone, 3-O- [α-L-rhamnopyranosyl (1-4 ] -β-D-glucopyranoside-(25S)-5β-spirostan-3β-ol , 3β-O-D-glucopyranoside quinovic acid, mangiferin , 3'-p-hydroxybenzoyl-mangiferin, physcion, benzenyl methanol β-D-glucopyranoside and Vanillic acid.

结果： 1。从植物A的80％乙醇提取物中共分离得到16个化合物，分别为：-落叶松脂醇、-异落叶松脂醇、异落叶松脂醇9-O-β-D-吡喃葡萄糖苷、tanegoside B、芹菜素、芹菜素7-O-β-葡萄糖苷、芹菜素7-O-β-新橙皮糖苷、槲皮素3-O-β-D-吡喃葡萄糖苷、1，7-二羟基-3，4-二甲氧基-口山酮、菝葜皂苷元-3-O-[α-L-吡喃鼠李糖基（1-4）]-β-D-吡喃葡萄糖苷、喹诺酸3β-O-D-葡萄糖苷、知母宁、3′-对羟基苯甲酸-知母宁、大黄素甲醚、苯甲醇-β-D-吡喃葡萄糖苷、香草酸。

Objective to establish a method for simultaneous determination of rutin, hyperin, isoquercitrin, 4,5-O-dicaffeoyl quinic acid and isorhamnetin-3-O-glucoside in Herba Artemisiae Capillariae.

目的 建立同时测定茵陈中芦丁、金丝桃苷、异槲皮苷、4，5-O-二咖啡酰奎宁酸、异鼠李素－3-O-葡萄糖苷含量的方法，为茵陈药材的质量控制提供依据。

Results The linear response range was 0.9420-18.84mg L^(-1)(r=0.9995), 1.190-23.79 mg L^(-1)(r=0.9995), 1.107-22.14 mgL^(-1)(r=0.9994), 56.78-1.136×10^3 mgL^(-1)(r=0.9990) and 0.6219-12.44 mgL^(-1)(r=0.9998), respectively (n=5). The average recoveries (n=9) of rutin, hyperin, isoquercitrin, 4, 5-O-dicaffeoyl quinic acid and isorhamnetin-3-O-glucoside were 98.1%, 100.7%, 98.4%, 100.2% and 101.7%, respectively.

结果 芦丁、金丝桃苷、异槲皮苷、4，5-O-二咖啡酰奎宁酸、异鼠李素－3-O-葡萄糖苷质量浓度分别在0.942~18.84mgL^(-1)(r=0.9995)、1.190~23.79mgL^(-1)(r=0.9995)、1.107~22.14mgL^(-1)(r=0.9994)、56.78~1.136×10^3 mgL^(-1)(r=0.9990)、0.6219~12.44mgL^(-1)(r=0.9998)内与峰面积呈良好的线性关系(n=5)；方法回收率(n=9)分别为98.1%、100.7%、98.4%、100.2%、101.7%。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。