O=C(NC(=O)c1ccccc1[N+](=O)[O-])Nc1ccc(Oc2ncc(Cl)cn2)c([N+](=O)[O-])c1
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?