网站首页 情感咨询 情感美文 情感百科 情感生活 学习充电 旧版美文
Nefedipine was synthesized with m-Nitrobenzaldehyde,ethyl acetoacetate,ammonium acetate.
以间硝基苯甲醛,乙酰乙酸乙酯,氨化试剂为原料。
乙酸铵是一个有机盐，分子式为CH3COONH4，白色粉末，可通过乙酸和氨反应得到。可以用作分析试剂、肉类防腐剂，或者制药等。
Ammonium acetate is a chemical compound with the formula NH4CH3CO2. It is a white, hygroscopic solid and can be derived from the reaction of ammonia and acetic acid. It is available commercially.
依恋情感网英汉例句词典收录3870147条英语例句词条，基本涵盖了全部常用英语单词的释义及例句，是英语学习的有利工具。