acetoacetic ester

例句：

1. 1. This compound is used in the synthesis of many organic compounds.
   这种化合物在合成许多有机化合物中被使用。
2. 2.The chemist mixed this substance with water to create a new chemical.
   化学家将这种物质与水混合以创造一种新的化学物质。
3. 3. The acetoacetic ester was used as an antifreeze in cars during cold weather.
   乙酸乙酯在寒冷天气中用作汽车防冻剂。