O=C(Nc1c(Cl)cc([N+](=O)[O-])cc1Cl)C(=O)C(C(=O)c1ccncc1)C1OC(=O)c2ccccc21
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?