Methods The substance was synthesized from P-hydroxybenzoic acid through three steps, those are etherification, preparation of acyl halide and amidation of the raw material.
方法以对羟基苯甲酸为原料，经三步合成，即原料的醚化、酰氯制备和酰胺化。
The composition and preparation of Quizalofop-P-ethyl. Fluoroglycofen 12.5% EW was introduced in this paper. The properties and the effects of the product were tested.
本文介绍了精喹。乙羧氟12.5%水乳剂配方的组成和制备方法，并对其产品性能和田间药效进行了测试和试验。
The factors which affect the yield of hydrolysis reaction were studied by orthogonal experiments, and a handy method of preparation for p-chlorophenylacetic acid was proposed.
通过正交实验研究了影响水解反应收率的因素，找到了一条方便可行的制备方法。
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