O=c1c(C(c2ccc([N+](=O)[O-])cc2)c2c(O)c3ccccc3n(-c3ccccc3)c2=O)c(O)c2ccccc2n1-c1ccccc1
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?