ethyl phenylhydrazine

例句：

1. 1. This compound is used in the synthesis of pharmaceuticals.
   这种化合物用于合成药品。
2. 2. The molecule has a unique structure that makes it useful in various applications.
   这个分子具有独特的结构，使其在各种应用中都很有用处。
3. 3.Ethyl phenylhydrazine is a key intermediate in the production of pesticides.
   乙苯基肼是生产农药的关键中间体。