O=C1OCCN1C(=O)[C@H]1[C@H](c2ccc(F)cc2)C(c2cccc(Cl)c2)=NN1c1ccc(Br)cc1
Aromatic rings (also known as aromatic compounds or arenes) are hydrocarbons which contain benzene, or some other related ring structure. How many aromatic rings does the molecule contain?