Objective: To improve the synthesis technology of n-butyl gallate.

目的：改进没食子酸正丁酯的合成工艺。

Ethyl and propyl gallate were synthesized without water carrying agent.

乙酯和丙酯的合成还摒弃了带水剂。

Objective To determine the gallate level in Reling Qing Syrup with HPLC.

目的用高效液相色谱法测定热淋清糖浆中没食子酸的含量。

Result:In optimal conditions, the yield of n-butyl gallate was over 93.8%.

结果：在最佳实验条件下没食子酸正丁酯收率达93.8%。

The yield of n-butyl gallate was 93.4% under the optimum reaction condition.

在优化反应条件下，没食子酸正丁酯的收率达到93．4％。