O=C(Nc1nc2n(n1)C(c1ccc(F)cc1)C=C(c1ccc(Cl)cc1)N2)c1ccc([N+](=O)[O-])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?