hexylidene

例句：

1. 1. The molecule has a hexylidene group at the end of its carbon chain.
   这个分子的碳链末端有一个己烯基团。
2. 2. Hexylidene is a type of compound that contains a six-membered ring.
   己烯基是一种含有六元环的化合物。
3. 3. In organic chemistry, hexylidene is used to describe the structure of alkanes with a six-membered ring.
   在有机化学中，己烯基用于描述具有六元环结构的烷烃的结构。