前言：目的：4 -羟基香豆素是合成其他4 -羟基香豆素衍生物的关键中间体，本研究摸索出了合成4 -羟基香豆素的最有效条件。
Objective: 4-hydroxycoumarin is a pivotal intermediate in synthesis of other 4-hydroxycoumarin derivatives. This article aims to investigate the optimal condition in synthesis of 4-hydroxycoumarin.
医药、化工中间体，主要用于医药合成及其他药物原料。
Pharmaceutical, chemical intermediate, mainly used in pharmaceutical synthesis and other drug materials.
以对照品为参照物，对其他色谱峰的相对保留时间和相对峰面积进行计算，作为技术参数评价中间体的质量。
The relative time and relative area were calculated to the peak of standard material. The similarity were calculated by Excel.
以对照品为参照物，对其他色谱峰的相对保留时间和相对峰面积进行计算，作为技术参数评价中间体的质量。
The relative time and relative area were calculated to the peak of standard material. The similarity were calculated by Excel.
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