alkyl benzene

例句：

1. 1. This compound is a key intermediate in the synthesis of alkylbenthien.
   这种化合物是合成烷基苯的关键中间体。
2. 2.Alkylbenthien is widely used as a solvent and plasticizer in the manufacturing of various products.
   烷基苯广泛用于制造各种产品的溶剂和增塑剂。
3. 3.The alkylbenthien was extracted from petroleum by chemical means.
   烷基苯是通过化学方法从石油中提取出来的。