Chinoline is a nitrogen-containing heterocyclic compound that is derived from aniline. It has a bicyclic structure, consisting of a benzene ring fused to a pyridine ring. Chinoline is primarily used in the synthesis of various dyes, pharmaceuticals, and agrochemicals due to its unique chemical properties. This compound is also found in some natural products and can be produced through the distillation of coal tar. Chinoline is important in organic chemistry and serves as a building block for more complex molecules, making it valuable in research and industrial applications.