isopentylidene

例句：

1. 1. The compound has a unique chemical structure that is not found in other compounds.
   这种化合物具有独特的化学结构，在其他化合物中找不到。
2. 2. This compound is used in the production of plastics and rubber, as it has unique properties.
   这种化合物用于生产塑料和橡胶，因为它具有独特的性质。
3. 3. The isopentylidene group is a key structural element in many natural products, such as vitamins andhormones.
   异戊烯基是许多天然产物的关键结构元素，如维生素和激素。