O=C(CNc1ccccc1[N+](=O)[O-])Nn1cnc2ccc(S(=O)(=O)Nc3ccccc3[N+](=O)[O-])cc2c1=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?