O=C(O)c1cc(NC(=O)c2cccc(C(=O)Nc3cc(C(=O)O)cc(C(=O)O)c3)c2)cc(C(=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?