sulphonic acid ester

例句：

1. 1. The compound is a key intermediate inthe synthesis of many pharmaceutical drugs.
   这种化合物是合成许多药物的关键中间体。
2. 2. The esterification process isused to convert fatty acids into their correspondingsulphonic acid esters.
   酯化过程用于将脂肪酸转化为相应的硫酸酯。
3. 3. The esterification reaction isan important step in the production of syntheticresins and plastics.
   酯化反应是合成树脂和塑料生产中的一个重要步骤。