cyclopentadiene

例句：

1. 1. This compound is a key intermediate in the synthesis of many important chemicals.
   这种化合物是合成许多重要化学品的关键中间体。
2. 2.The discovery of this compound has led to significant advancements in materials science.
   这种化合物的发现在材料科学领域取得了重大进展。
3. 3.Cyclopentadiene is a highly reactive compound that can be used in various chemical reactions.
   环戊二烯是一种高度反应性的化合物，可以在各种化学反应中使用。