萘啶（Naphthyridines）是一类化学式为C₈H₆N₂的杂环化合物，其结构可看做是萘的两个CH被两个氮原子取代。萘啶有10种异构体。

• 1,2-萘啶（噌啉）

• 1,3-萘啶（喹唑啉）

• 1,4-萘啶（喹喔啉）

• 1,5-萘啶

• 1,6-萘啶

• 1,7-萘啶

• 1,8-萘啶

• 2,3-萘啶（酞嗪）

• 2,6-萘啶

• 2,7-萘啶

Diazanaphthalenes are a class of aromatic heterocyclic chemical compounds that have the formula C₈H₆N₂. They consist of a naphthalene double ring in which two of the carbon atoms have been replaced with nitrogen atoms. There are ten positional isomers, which differ by the locations of the nitrogen atoms.