A six - membered heterocyclic compound,such as pyridine,that contains one or more atoms of nitrogen with a ring structure resembling that of benzene.

• 吖?，连氮由六种元素构成的杂环化合物，如氮苯(吡啶)，它由一个或更多的氮原子构成，呈环状结构，类似苯的结构