查询词典 aromatic compounds

Efficacious drugs were made of these species for treatment of cough, phlegm, breathe heavily, especially, to cure lung disease. We have investigated on the Chemical constituents of Adenophora stenanthina subspecies xifengsis collected from Gansu Qingyang, and twenty four compounds were isolated from ethanol extraction by chromatography technigues. Twenty compounds were identified by means of chemical and spectra methods（IR, FAB-MS, EI-MS,〓,〓, DEPT , among which three compounds were new as 3βvanilloyloxy-stigmast-5-ene-7β-one; 3β-Vanilloyloxy-stigmast-5-en-7 β-ol; 3β-vanilloyloxy-stigmast-5-en-7β, 15 〓-diol.

我们对采自甘肃庆阳的西峰沙参Adenophorastenanthina subsp.xifengensis）进行了化学成分的研究，利用现代层析手段从该植物的乙醇浸膏中分离出二十四个化合物，经化学方法和波谱技术（红外，质谱，核磁共振谱）鉴定了二十个化合物的结构，其中三个为新的化合物，它们分别是：豆甾-5-烯-7-酮-3β-香草酸酯；7β-羟基-豆甾-5-烯-3β-香草酸酯；7β，15ξ-二羟基-豆甾-5-烯-3β-香草酸酯。

The value of current density and the apparent active energy of electroreduction of substituted nitrobenzene depend on the electronic effect of substituted group and space resistance. o,m,p-chloronitrobenzene will be electroreduced to azoxy compounds by taking three electrons, o,m-nitrotoulene and o,m-nitrobenzoic acid will be reduced to phenol compounds by taking four electrons, and p-nitrotoulene will be reduced to the aniline by taking six electrons. According to these results, the electroreduction mechanism of the substituted aryl nitro-compounds was studied in detail.

在电还原过程中，还原峰电流和表观活化能的大小均与取代基的电子效应和空间位阻相关，同时取代硝基氯苯得3个电子将还原生成氧化偶氮苯类化合物：邻、间硝基甲苯、硝基苯甲酸得4个电子将还原生成酚类化合物；对硝基甲苯得6个电子将还原生成胺类化合物，在此基础上，探讨了各芳族硝基化合物的电还原机理。

From Cacalia deltophylla (collected from Luqu County, Gansu Province), 22 compounds were isolated, of which 15 compounds have been identified. Among them, two compounds are new. They are named as 3-methyl-4-hydro-8-acetyl-furanonaphth-9-one and 1hydroxy-2-methoxy-3-acetyl-4, 8-dimethyl-5, 8-dihydro-naphthalene.

从采自甘肃省碌曲县的三角叶蟹甲草全草的甲醇提取物的石油醚部分和乙酸乙酯部分中，采用同样方法分离得到22个化合物，鉴定了其中的15个化合物，其中有2个为新化合物，分别命名为3-甲基-4-氢-8-乙酰基-呋喃萘-9-酮（2）和1-羟基-2-甲氧基-3-乙酰基-4，8-二甲基-5，8-二氢-萘（3）。

Results: Sixty-one constituents were firstly isolated and identified from the fruits of 3 species of Chaenomeles. Forty compounds in Chaenomeles lagenaria, thirty-four compounds in Xuan mugua (C.lagenaria from Xuanzhou) and 23 compounds in C.sinensis were isolated and identified respectively.

结果：从3种木瓜的乙醚提取部位中首次分离与鉴定出61个化合物，其中皱皮木瓜 40个化合物，宣木瓜(C.lagenaria 产自安徽宣州) 34个化合物，光皮木瓜 23个化合物。

Compounds 2-4 were isolated from the plants of Chloranthaceae for the first time.The antibacterial activities of these six compounds were tested for the first time.Some compounds may have potential for future study and development as plant-derived oral antibacterial agents.

化合物1为1个新的天然产物，化合物2~4为首次从金粟兰科植物中分离得到，首次测定了6种香豆精类化学成分的抗菌活性，一些化合物具有进一步研究开发成为抑制口腔细菌的天然药用植物制剂的潜力。

When the resulting nitro compounds was reduced over 5% Pd/C catalyst, the nitro phosphinic acids required more catalyst that the esters nitro phosphinic acid, and dinitro compounds required more catalyst than mono-nitro compounds in the case of all nitro groups completely changed into amino groups.

用5％Pd/C作催化剂，将上述硝基物还原时发现，次膦酸形成的硝基物比次膦酸酯形成的硝基物需要更多催化剂才能使硝基全部还原成氨基；二硝基化合物比单硝基化合物需要更多的催化剂。

As an artificial enzyme, it can be optimized by changing the diphenylmethane units or bridging chains or by chemical modification of hydrophobic cavities to form new host compounds. Different host compounds can recognize different guest compounds to become an supramolecular system.

不同的主体化合物能俘获不同种类的客体分子，与客体形成超分子体系，对不同反应底物进行络合和催化，达到有选择性地控制反应，提高反应速率，模拟酶促反应和分子识别的目的。

Preliminary antitumor activity in vitro of the new compounds indicated that the compounds have obvious inhibitory effect on human leukaemia cell (HL-60) and human galactophore cancer cell (MDA-MB-468) in the concentration of 10-4 mol/L. This result is a basis for further study on the synthesis and biological activity of this kind of compounds.

对所合成的10个新化合物进行了抗肿瘤体外生物活性试验，初步生物活性实验结果表明，该类化合物在浓度为10-4 mol/L时对人白血病细胞株(HL-60)和人乳腺癌细胞株(MDA-MB-468)有明显的抑制作用，在浓度为10-5 mol/L时没有明显的抑制作用，这一研究结果为进一步研究此类化合物的合成、生物活性的研究奠定了基础。

We select pharmacodynamics index, establish animal model, and carve availability group according to pharmacological experiments. And draw a conclusion that the 60%EtOH extr. is availability group. In this group, 15 compounds have been isolated, 13 are identified, 6 are the first isolation from Galium verum L., 2 are the compounds that no document reports. Most of the compounds are flavonoids, others are organic acid and anthraquinone.

本课题首先选取治疗下肢静脉炎相关的药效学指标，建立动物模型，在药理学实验的基础上，确立大孔树脂60％乙醇洗脱部位为有效部位，继而对该部位进行进一步的化学研究，分离出单体化合物15个，鉴定结构13个，其中有6个是从蓬子菜中首次分离得到，有2个化合物是国内外文献中未见报道的化合物，结构鉴定工作正在进行中。

The results of biological test showed that some of these compounds had good fungicidal activity. The inhibition rate of most compounds to Botrytis cinerea Pers and Gibberella zeae coud reach 50% at the concentration of 50 mg/L. The inhibition rate of two compounds to Botrytis cinereapers were 85%.

同时对6种病原菌进行了生物活性测试，结果表明：在50 mg/L质量浓度下，大部分化合物对黄瓜灰霉病菌和小麦赤霉病菌抑制效果较好，抑制率达50%以上，且优于对照商品醚菌酯；特别是Ⅱh、Ⅱi化合物对黄瓜灰霉病菌抑制率达85%。

Mr. Putin said there were signs of genocide against the Ossetian people.

普京说，有迹象表明对南奥塞梯人进行了种族清洗。

What I'm trying to say, Tristan is...

特瑞斯坦。我想说的是。