glycollic anhydride

例句：

1. 1. This compound is a key intermediate in the synthesis of glycolic acid.
   这种化合物是合成甘油酸的关键环节。
2. 2.The reaction between the two acids produces a glycolic anhydride, which is used as a solvent.
   两种酸之间的反应产生了一种甘油酸酐，用作溶剂。
3. 3. The glycolic anhydride reacts with water to form acetic acid and carbon dioxide gas.
   甘油酸酐与水反应生成乙酸和二氧化碳气体。