Acridone is an organic compound based on the acridine skeleton, with a carbonyl group at the 9 position.

Optical spectra reveal that the keto tautomer predominates in the gas-phase and in ethanol solution.

[1] Acridone can be synthesized by heating fenamic acid.

[2] One of the first who were able to prove the compound's existence was Karl Drechsler, Student of G. Goldschmiedt, at the k.u.k.

[3] Acridone constitutes the scaffold of some synthetic compounds with diverse pharmacological activities.