Ethopabate is prepared via esterification, acylation and alkylation from p-aminosalicylic acid in87.4% overall yield. 以对氨基水杨酸为原料,经酯化、酰化和烃化反应得乙氧苯酯,总收率为87.4%。
Conclusion: this new method can be used for the determination content of the enteric coated tablet of sodium p-aminosalicylic acid. 结论:采用紫外分光光度法测定对氨基水杨酸钠包衣片的含量,比永停滴定法更为简单、快速。
Determination of pyridine in water using ultraviolet spectrometry by p-aminosalicylic acid 对氨基水扬酸紫外分光光度法测定水中吡啶