衍生物

A series of 3-naphthyl-2--1,3-thiazolidin-4-ones were synthesized by the three-component one-pot cyclocondensation of naphthylamine, aromatic aldehyde and 2-mercaptoacetic acid using a microwave-assisted method in the presence of DMAP/DCC.

利用微波促进的多组分一锅法，在封管条件下，以萘胺、芳醛和巯基乙酸为原料，4-二甲氨基吡啶/N，N'-二环已基碳二亚胺为催化剂，合成了系列新的噻唑烷酮衍生物，该反应具有时间短、操作简便等优点。

Nerve gas Weapon of chemical war fare that affects the transmission of nerve impulses through the nervous system.

神经毒气是氟磷酸的衍生物，被作为化学武器或杀虫剂使用。

Their derivatives are bio-oxidation of nicotinamide Coenzyme some important components.

其衍生物烟酰胺是生物氧化中某些重要辅酶的组成部分。

Epoxy propane is a basic material for petro-chemical industry, and it is the third derivative of Propylene except for Polypropylene and propylene nitrile.

环氧丙烷是重要的石油化工基础原料，在丙稀的重要衍生物中是仅次于聚丙烯和丙烯腈的第三大品种。

According to the weight percent, the copolymer composition comprises: 25 percent to 99 percent of the vinyl aromatic monomer; 0 percent to 30 percent of the en-unsaturated nitrile monomer; 1 percent to 50 percent ene dicarboxylic acid derivative monomer.

这种共聚组合物按重量百分比包含：25至99％的乙烯基芳香族单体；0至30％的烯属不饱和腈类单体；1至50％的烯属二元酸衍生物单体。

amino-1,4-naphthoquinones failed to be obtained through the classical routes due to the strongly electron-withdrawing nitro group, which deactivating the nucleophilic ability of the nitro anilines.

2-硝基苯胺-1，4-萘醌类衍生物由于硝基的强吸电性使硝基苯胺的亲核性减弱，不能通过经典的加成-氧化或加成-取代的方法合成得到。

Ozone is formed in the reaction, and a nitro derivative of the olefin.

在反应中形成臭氧及烯烃的硝基衍生物。

Ozone is formed in the reaction, and a nitro derivative of the olef in

在反应中形成臭氧及烯烃的硝基衍生物。

In order to obtain higher effect antitumor drugs, we synthesized the derivatives of benzaldehyde nitrogen mustard and their metal complexes. Our works are concentrated on the following

为获得更好的抗肿瘤药物，我们以苯甲醛氮芥为母体合成了一系列它的衍生物及金属配合物，围绕这一课题做了如下工作

It is unquestionable that many derivatives have advantage over nitrogen mustard. Some of them have been used or will be used in clinical.

为了获得低毒高效的抗癌药物，人们相继合成了数以万计氮芥衍生物，期望降低毒性提高治疗指数。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。