CC(C)[C@@H]1CC[C@@H](C)C[C@H]1OC(=O)C[n+]1cc(-c2ccc(Cl)cc2)n2c1CCCCC2.[Cl-]
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?