化合物

In this dissertation, the chemical constituents of the red algae Laurencia cartilaginea and Laurencia majuscula collected from the South China Sea of the Xisha Islands were studied, and 12 compounds were isolated by combination of extraction and separation and identified by various kinds of spectrum.

本论文主要采用硅胶柱层析、RPC—18反相柱、Sephdex LH—20、薄层层析及重结晶等方法，对采自中国南海西沙群岛的软骨凹顶藻Laurencia cartilaginea和略大凹顶藻Laurencia majuscula的化学成分进行研究，共得到12种化合物，并运用各种波谱手段对得到的化合物进行了结构鉴定。

In Laurencia cartilaginea, nine compounds (compoundsl-9) have been isolated and identified from the extraction of EtOAc fraction.

从软骨凹顶藻Laurencia cartilaginea乙醇浸提液的乙酸乙酯部分分离得到8个单体化合物和一组甾醇混合物(化合物1—9)，并通过IR、~1H-NMR、~(13)C-NMR、EI-MS、GC-MS、FAB-MS、ESI等波谱技术进行鉴定。

All compounds except 1 were isolated from this plant for the first time, and compound 5 was obtained from Leguminosae for the first time.

除化合物1以外，其余均是首次从铁甲草中分离得到，其中化合物5为首次在该科植物中发现。

Image recording medium comprising a substrateand an imaging layer containing binder, developer, dye, stabilizer against oil exposure (e.g. Calcium salt of organic acid); method for preparing a recording medium comprising binder, radiation absorber, phenolic compound, calcium salt of organic acid, and leuco dye, said radiation absorber initiating reaction between phenolic compound, calcium salt of organic acid and leuco dye.

图像记录介质，其包含衬底和成像层，所述成像层包含粘合剂、显色剂、染料、抵抗油暴露的稳定剂；制备包含粘合剂、辐射吸收剂、酚类化合物、有机酸的钙盐和无色染料的记录介质的方法，所述辐射吸收剂引发酚类化合物、有机酸的钙盐和无色染料之间的反应。

For better understanding the relationship between chemistry composes and activities, and promoting the competitive strength, 16 benzene derivatives (three new compounds and a novel skeleton) were isolated from Ligularia veitchiana which were collected in Hubei province.

为了更好的了解植物药中的化学成分及药效关系，提升我国植物药在国际市场的竞争力，我们对采自湖北的离舌橐吾进行了系统的化学成分分离，得到16个苯的衍生物，其中，新化合物三个，新骨架化合物一个。

The antioxidant activity of some of compounds of extracted from Ligustrum sinens is analyzed. Results show that some compounds have antioxidant activity, and two compounds have strong antioxidant activity.

对女贞小腊的一些化学成分进行的抗氧化实验表明，部分化合物具有较好的抗氧化活性，个别化合物有很强的抗氧化活性。

Compound 4 was isolated from the genus Lonicera for the first time and all 5 compounds were first isolated from the species of this plant.

经文献检索，5个化合物均为首次从该种植物中分离得到，其中化合物4系首次从该属植物中分得。

Compounds Ⅰ,Ⅱ were first isolated from Genus Lonicera, while compounds Ⅲ~Ⅺ were isolated from the plant for the first time.

化合物Ⅰ、Ⅱ为首次从忍冬属植物中分离得到，化合物Ⅲ~Ⅺ为首次从该种植物中分离得到。

Six compounds have been isolated from Lysimachia congestiflora, and ardicrenin (5) is isolated from this species for the first time.

从聚花过路黄中分离得到6个化合物，其中化合物(5)为首次从该植物中发现。

The first compound derived from Chinese herbal remedies to enter the Western pharmacopoeia was ephedrine, an amphetamine-like stimulant. A Japanese scientist isolated it in the 1880s from the Chinese medicinal herb mahuang, which was used to treat congestion.

从中草药中提取并进入西方药典的第一个化合物是麻黄碱，它是一种类似安非他明的兴奋剂，1880年代，一个日本科学家从中草药麻黄中提取了这种化合物，用于治疗淤血。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。