O=C1c2cccc3cccc(c23)C(=O)N1CCCN1CCN(CCCN2C(=O)c3cccc4cccc(c34)C2=O)CC1
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?