O=C(Nc1ccc(Cl)cc1Cl)C(=O)C(C(=O)c1ccc2ccccc2c1)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?