It seemed to us a matter of interest to study this reaction further, both for the purpose of establishing the course of the reaction and the structures of the quinones mentioned but not described in the patent, and with the idea of gaining further evidence of the structures of the benzanthraquinones previously obtained by uss by the action of aluminum chloride on methylated naphthoyl-2-benzoic acids..
![Benz[a]anthracene-7,12-dione, 2-methyl- Structure](https://image.chemsrc.com/caspic/316/58024-07-0.png)