cycloartane

例句：

1. 1. This compound is a key intermediate in the synthesis of many important drugs.
   这种化合物是合成许多重要药物的关键中间体。
2. 2.The cycloalkanes are widely used as solvents and fuels.
   环烷烃被广泛用于作为溶剂和燃料。
3. 3.Cycloalkanes have unique properties that make them valuable for various applications.
   环烷烃具有独特的性质，使其在各种应用中具有价值。