O=C(Cc1nc2c3c(ccc2nc1O)C(=O)c1ccccc1C3=O)C(=O)Nc1ccccc1[N+](=O)[O-]
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?