您要查找的是不是:
- Keywords dichloromethyl 3 hydroxy 2 methylpyridine;pyritinol hydrochloride;dichloride sulfoxide; 二氯甲基-3-羟基-2-甲基吡啶;盐酸吡硫醇;氯化亚砜;
- Keywords Propionaldehyde;Cyclocondensation;Kinetics;2 ethyl 3;5;dimethylpyridine; 丙醛;环合;动力学;2-乙基-3.;5-二甲基吡啶;
- 4 Chloro 4,5 dimethyl 1,3 dioxolan 2 one was synthesized from 3 hydroxy 2 butanone by acylation and cyclization, the yield was above 86%. 以羟基丁酮为原料,经酰化、环合等步骤合成医药中间体4氯4,5二甲基1,3二氧杂环戊烷2酮,合成收率达86%25以上
- In this paper, the preparation of hydroxy ethyl chitosan sulfate was studied. 研究了磺化羟乙基壳聚糖的制备方法。
- The farmer paid 3 laborers to gather the crop. 农场主雇佣3名工人收割庄稼。
- These fish vary in weight from 3 lb to 5 lb. 这些鱼的重量从3磅到5磅不等。
- The key step in the synthesis is Wittig coupling of farnesyltriphenylphosphonium bromide (8) with ethyl 2-oxo-3-methyl butyrate (3). (3) was prepared by Grignard reaction of ethyl oxalate with iso-propylmagnesium bromide. 其中关键步骤是溴化法呢基三苯基?(8)和2-氧代-3-甲基丁酸乙酯(3)的Wittig反应。
- He lives 3 miles away from here. 他住在距离这里三英里的地方。
- I'm tied up in a meeting until 3 pm. 我开会直到下午三点钟方可脱身。
- Mr. and Mrs. Jones have 3 daughters. 仲斯夫妇有三个女儿。
- The beam has a thickness of 3 inches. 这根梁厚3英寸。
- The government hopes to hold salary increase to 3%. 政府希望将工次增长率控制在3%25。
- The horse racing is to be held at 3 p.m. tomorrow. 赛马比赛将于明天下午3点举行。
- We ordered 3 cases of soda for the party. 我们为晚会定购了三箱苏打水。
- Keywords ethyl cyanoacetate;\ ethyl acetoacetate;\ ethyl amine;\ N ethyl 3 cyano 4 methyl 6 hydroxypyridin 2 one;\ derivatives; 氰乙酸乙酯;乙酰乙酸乙酯;乙胺;N-乙基-3-氰基-4-甲基-6-羟基吡啶-2-酮;衍生物;
- Above term only apply to dorsa above 3,000 bales. 以上条件,仅适用于三千捆以上的订单。
- The farmer paid 3 labourers to gather the crop. 农场主雇佣3名工人收割庄稼。
- Ethyl chloroformate reacted with both the hydroxy group and the carboxy group of the 17 position. 用氯甲酸乙酯将17位醇羟基和羧羟基同时酰化;
- His orchards bring in$3,000 a year. 他的果园每年获利3000美元。
- Add 3 heaped teaspoons of sugar. 加满满的三匙糖。