Indoline is an aromatic heterocyclic organic compound with the chemical formulation C8H9N.

It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing ring.

The compound is based on the indole structure, but the 2-3 bond is saturated.

[1][2] Indoline can be produced from the reaction of indole, zinc and 85% phosphoric acid.

This article about a heterocyclic compound is a stub.