类生物碱类

Cephalotaxine ester of 2-oxo-6-methylheptanoic acid was treated with lithium diisopropylamide and Me O-(1-methoxyisopropyl)glycolate to give a mixture of homoisoharringtonine and its stereoisomers with 56% yield. The four stereoisomers separated by TLC showed identical mass spectra and almost superimposed IR but with different 1H NMR spectra. The configuration of the 2'-C and 3'-C of the four isomers were postulated based upon their 1H NMR spectra as compared with the 1H NMR spectra of isoharringtonine and its stereoisomers.

2-氧代-6-甲基庚酰基三尖杉碱(3)与0-(1-甲氧基异丙基)羟基乙酸甲酯(4)在强碱性试剂二异丙胺锂存在下，起亲核加成反应，反应中间体5在室温用酸性丙酮水解，得到一种新的三尖杉酯类生物碱一一高异三尖杉酯碱(6c)及其立体异构体(6a、6b、6d)的混合物，产率56%、通过制备薄层层析分得这四个立体异构体，它们的1H NMR和异三尖杉酯碱及其立体异构体的1H NMR类似，推定了它们的绝对构型。

It was used to study glucoprotein N-link oligosaccharide as an instrument drug since it was separated initially from the fruit of Australian Swainsona canescens and North America locoweed including Astragalus and Oxytropis spp.

苦马豆素是一种水溶性的吲哚类生物碱，长期以来一直是研究糖蛋白N-连接寡糖合成的工具药。

Objective: To analyze the transformation of lipo-alkaloids in the Kusnezoff Monkshood Root under high temperature and pressure.

中文摘要：目的：分析高温高压条件下草乌中脂类生物碱的变化。

In this thesis, we developed a new method to construct 2, 3, 6-trisubstituted piperidines using enantiopure -amino acid derivatives as the starting material and applied them to the synthesis of some piperidine alkaloids which showed interesting physiological activities.

本论文中，我们从非手性原料出发，通过手性胺对、(-不饱和酯的Michael加成来获得光学纯的-氨基酸酯，发展了一种构建2、3、6-三取代哌啶环的方法，并利用这种方法合成了一些具有重要生理活性的生物碱类天然产物。

The constituents of bulb of F. puqiensis were studied. Five steroid alkaloids were isolated. The plane structure and stereoscopic configuration of 4 compounds were elucidated. They are named as puqienine A (FP-33), puqienine B (FP-3), N-demethyl-puqietinone (〓 FP-34) and puqietinone (〓, FP-9). Puqienine A and N-demethyl-puqietinone are new compounds. Puqienine B is as same as FPQ-3 elucidated by Prof.

对F.puqiensis鳞茎化学成份进行了研究，分得5个甾体类生物碱成分，并采用 UV、IR、EI-MS、1D-NMR，HHCOSY、CHCOSY、HMBC和X-RAY等光谱技术和理化常数测定，鉴定出4个化合物的平面结构和立体构型，分别为蒲圻贝母碱甲（puqienineA，FP-33）、蒲圻贝母碱乙（puqienineB，FP-3）、N-去甲蒲贝酮碱（N-demethyl-puqietinone，FP-34）和蒲贝酮碱（puqietinone，FP-9），其中蒲圻贝母碱甲和N-去甲蒲贝酮碱为新化合物。

Results A new quinoloe alkaloid named 8-methoxy-4-quinolone-2-caboxylic acid was isolated from L. echinata and was found to have antibacterial activity on Pseudomonas pyocyanea ATCC 27853, EPEC O111, pneumobacillus and Staphylococcus epidermidis.

结果 从东北鹤虱中分离出一个新喹酮类生物碱，鉴定为8-甲氧基－4-喹酮－2-羧酸，并对铜绿假单胞菌、肠致病性大肠埃希菌、肺炎克雷伯菌及表皮葡萄球菌具有抗菌活性。

Analysis of spectral data for 13CNMR of sixteen strychnos alkaloids.

马钱子中16个生物碱类化合物13CNMR谱的数据分析。

Commonly used alkaloidal salts may be titrated accurately with acetous HClO_4 in non-aquous media in semi-micro scale using crystal violet as visual indi- cator.

作者对常用的生物碱类药物及其注射剂片剂，试用半微量非水溶液滴定法进行测定其含量。

The content of aconitic alkaloids in Sini Decoction and its variety depend on both their solubility and chemical stability.

结论四逆汤中的乌头碱类生物碱的种类及含量由其溶解性和化学稳定性共同决定。

Object To study the stripping and hydrolyzing balance of aconitic alkaloids in Sini Decoction.

目的 研究四逆汤中乌头类生物碱的溶出平衡和水解平衡。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。