查询词典 ethyl

B (1R,3S)-1-ethyl-3-bromocyclopentane,andan optically active stereoisomer of 1,3-diethylcyclohexane.

答：指出1-甲基萘的所有手性中心，它存在多少个立体异构体

An experiment was conducted to study the antifeeding effects of ethanol, ethyl acetate and water solutions of linoleic acid, pimelic acid, suberic acid, azelaic acid, and n-nonanoic acid against imago of Pissodes punctatus. Absolute antifeeding rate and relative antifeeding rate were used to appraise the antifeeding effects of organic acids.

为了寻找华山松木蠹象(Pissodes punctatus Langor et Zhang)环境友好的防治方法，研究了亚油酸、庚二酸、辛二酸、壬二酸、壬酸的酒精溶液、乙酸乙酯溶液和水溶液对华山松木蠹象成虫的拒食作用，采用了完全拒食虫率与相对拒食率来评价有机酸的拒食效果。

Based on a survey of the mechanism for reactive dyes containing β-hy-droxy-ethyl sulfonyl sulfuric ester on the cellulosic fibre, and the structures of non-ionic nature of disperse dyes , a new range of reactive disperse dyes for polyester cotton blends is proposed.

本文综合分析了含β-羟乙基碸硫酸酯基活性染料的染棉机理和聚酯纤维用非离子型分散染料的结构特点，提出了一类用于涤棉混纺织物的含β-羟乙基碸硫酸酯基活性分散染料。

On the basis of existing international achievements in the development of methyl bromide alternatives,the author suggested that the practicability of sulfuryl fluoride,ethyl formate,propylene oxide,and carbonyl sulfide in China be approached and considered that sufuryl fluoride is most promising.

遗憾的是，它也和许多已被人类淘汰的其它熏蒸剂一样，由于它属于消耗大气臭氧层的物质[1]，为了保护人类子孙万代良好的生活环境，已经在国际上取得共识，把它列为逐步淘汰的物质[2]，而且已于1979年开始采取了具体的法规性行动[3][4]。

Treatment of 3-amino-4-chlorobenzoic acid with trimethoxymethane generated methyl 3-amino-4-chlorobenzoate in 80.0% yield.2-ethyl pivalate was oxidized by sulfuryl chloride,an...

所得中间体2-乙基特戊酸酯低温下经磺酰氯氧化，与中间体3-氨基-4-氯苯甲酸甲酯反应，所得产物经重排、水解和酰化反应得到目标化合物，总产率25.8%。

The dispersion of glass ultra-fine powder in the organic vehicle of ethyl cellulose terpineol solution are improved significantly.

改性后可以改变或控制超微细粉体的表面能大小，从而可调节电子浆料的流变性和印刷适性。

In the temperature range 70~190℃, the volatility characteristics of the mainly used solvents and the mixed solutions, as well as the terpineol ethyl cellulose solution which as the organic vehicle were determined by the loss after being kept at a fixed temperature for twenty minutes.

用恒温失重方法研究了70~190℃范围内，电子浆料常用松油醇乙基纤维素体系有机载体和主要溶剂的挥发特性，得到了其在一定温度下保温20 min 的挥发量数据和适合制作电子浆料的有机载体配方。

In the process of laboratory study, oxycodone was prepared by oxidating thebaine at 6,14-position under oxydol, hydrodeoxidizing 7,8-position double bond and 14-position ether under palladium catalyst. Furthermore, N-methyl of oxycodone was isolated byα-chloro-ethyl chloroformate under anhydrous condition and protection of 14-position hydroxyl to obtain noroxycodone, which was further converted into methylnaltrexone by N-alkylation in presence of cyclopropyl bromomethane, then by isolating 3-position methyl of methylnaltrexone under boron tribromide, becoming hydrochloride to prepare target compound, natrexone hydrochloride.

实验室工艺方面，本文首先用双氧水氧化蒂巴因的6-位和14-位、在钯炭催化下加氢还原7-8位双键和14-位醚合成羟考酮，然后提出并优化了在无水和14-位保护的情况下，用氯甲酸-α-氯乙酯脱去羟考酮的N-位甲基合成去甲羟考酮，再用环丙甲基溴将去甲羟考酮的N-位烷基化合成甲基纳曲酮，最后采用三溴化硼脱去甲基纳曲酮的3-位甲基和成盐酸盐合成盐酸纳曲酮。

The reactivities of 1 and other long chain oximes with p nitrophenyl diphenyl phosphate, p nitrophenyl diethyl thiophosphate, and O ethyl ( s β diisopropylaminoethyl) methyl phosphonothiolate were studied.

报道了一种新的高亲核长链咪唑肟N 十四烷基咪唑 2 甲醛肟的设计与合成，并比较了它及其他长链咪唑肟与有机磷酸酯二苯基、对硝基苯基磷酸酯、对硫磷及 Vx 的反应活性。

Receptor agonist ; SA4503{1?[2?（3; 4?dimethoxyphenyl）ethyl]?4?（3?phenylpropyl）piperazine}; DTG[3?di（2?tolyl）guanidine]; DHEAS ; PREGS ; learning ; memory

σ受体激动剂； 1-[2-（3； 4-二甲氧基苯基）乙基]-4-（3-苯丙基）哌嗪（SA4503）； 1； 3-二（2-甲苯基胍）；脱氢雄表酮硫酸酯；孕烯醇酮硫酸酯；学习记忆

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。