oxygen heterocyclic ring

例句：

1. 1. The structure of this compound is similarto that of benzene, whichhas a similar oxygen heterocyclicring.
   这种化合物的结构与苯类似，苯也有类似的氧杂环戊烷结构。
2. 2. Oxygen heterocyclicrings are common in many natural compounds,such as vitamins and pigments.
   许多天然化合物中都含有氧杂环戊烷，如维生素和色素。
3. 3. The studyof oxygen heterocyclic rings hasimportant implications for understanding the properties of organicmolecules.
   研究氧杂环戊烷对理解有机分子的性质具有重要意义。