pyrenyl

例句：

1. 1. The molecule is composed of a pyranyl ring and a carboxylic acid group.
   这个分子由一个吡喃基环和羧酸基团组成。
2. 2. Pyranyl is a rare chemical compound that can be used in the production of explosives.
   吡喃基是一种罕见的化学化合物，可用于生产炸药。
3. 3.The pyranyl ring has a unique structure that makes it resistant to heat and light.
   吡喃基环具有独特的结构，使其对热和光具有抵抗力。