萜烷

The quality of cis-pinane synthesized from α-pinene by catalytic hydrogenation effects its post-products' yields and qualities.

以蒎烯为原料合成各种萜烯香料受到国内外香料界的普通重视，α-蒎烯催化氢化合成的顺式蒎烷的品位直接影响到后续产品的收率和质量。

Betulin and betulinic acid , the triterpenes of the lupane family, are considered to be potential agents against tumoral cancer and HIV .

桦木醇、桦木酸是具有羽扇烷结构的三萜化合物，目前的研究发现，它们具有较高的抗肿瘤、抗HIV病毒活性，它们的衍生物也有较高的生物活性。

In these bicyclic sesquiterpanes,the relative abundance of the rearranged drimane is regularly changed in spatial distribution,which may indicate the characteristics of petroleum migration and accumulation in QHD32-6 oilfield.

该油田双环倍半萜中重排补身烷的相对丰度在纵向上和横向上都表现出有规律的变化，这种规律性的变化可能反映了秦皇岛32-6油田油气运移与聚集的特征。

Two oleanane type triterpenes were isolated from the crude drug Lu Lu Tong , the fruits of Liquidambar formosana and their structures were elucidated as 2α,3β dihydroxy 23 norolean 4(24), 12(13) dien 28 oic acid(1), 2α,3β,23 trihydroxyolean 12(13) en 28 oic acid(2), based on 13 C NMR, DEPT, 1H NMR, 1H 1H COSY, 13 C 1H COSY, IR, MS and elemental analysis.

从生药路路通分离得到2个齐墩果烷骨架的五环三萜类化合物。通过13CNMR，DEPT，1HNMR，2D1H－13CCOSY，2D1H－1HCOSY，IR，MS和元素分析阐明了它们的结构。（1）为2α，3β－二羟基－23－去甲－齐墩果－4（24），12（13）－二烯－28－羧酸，（2）为2α，3β，23－三羟基齐墩果－12（13）－烯－28－羧酸，（1）未见文献报道，（2）是首次从这一植物中分离得

In this thesis, standard fingerprint of daphne diterpene esters from the root extract was first established by HPLC-UV, which can be used for D. genkwa identification and quality control. The major peaks in the standard fingerprint were identified by LC-MS.Quantitative analysis methods of yuanhuacine and yuanhuadine were established herein.

本文建立了芫花根中瑞香烷型二萜原酸酯类组分HPLC-UV标准指纹图谱，对主要色谱峰用LC-MS进行了归属，并对其中主要成分建立了定量分析方法，为不同产地、采收季节和人工栽培等原料药材的质量控制提供了科学依据。

Daphne diterpene esters are principal activitive components of Daphne genkwa, which is an endemic traditional Chinese medicine. Yuanhuacine has potent inhibition against several cancer cell lines. Inhibition against DNA topoisomerase I is probably its anticancer mechanism.

芫花为中国特有的瑞香科植物，主要有效成分为植物中罕见的瑞香烷型二萜原酸酯类化合物，其中芫花酯甲对多种癌细胞系有较强的抑制活性，对DNA拓扑异构酶I的抑制作用是其抗癌的可能机理。

Taxus media ; taxane diterpene ; flavonoid ; chemical constituent ; structure identification

曼地亚红豆杉；紫杉烷二萜；黄酮类化合物；化学成分；结构鉴定

MTT assay indicated that anti-proliferative activities in HeLa, SHIN3, HOAC-21 and HAC-2 cell lines were closely related to structure, 1,10-seco of eudesmane sesquiterpene lactone resulted in reduced anti-proliferative activity. The anti-tumor activity of isoalantolactone was probably achieved by inducing HeLa cell apoptosis.

提示A-环开环可能是导致桉叶烷型倍半萜内酯的体外抑制肿瘤细胞增殖作用消失或减弱的原因；异土木香内酯抑制肿瘤细胞增殖作用有可能是通过诱导肿瘤细胞凋亡机制而实现的。

The distribution of triterpenoidal saponins in the plants of Ladizabalaceae suggests the phylogenetic relation between Lardizabalaceae and Ranunculoideae of Ranunculaceae.

齐墩果烷型三萜皂甙不仅提示木通科与毛茛科的毛茛亚科的系统联系，而且甙元骨架的氧化水平与科内各属的系统进化也有一定的相关性。

ATA was found to exhibit more distinctive cytotoxicity toward human cervical squamous carcinoma HeLa cells than oleanolic acid, which suggested that the position of the carboxyl group significantly affects the cytotoxicity of oleanane-type pentacyclic triterpenes with a carboxyl group.

周晓华被发现展品更为鲜明的细胞毒性，对人体颈部鳞癌Hela细胞比齐墩果酸，这表明的立场与羧基显着影响细胞毒性的齐墩果烷型pentacyclic三萜类化合物与羧基。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。