O=C(NCCc1c[nH]c2ccccc12)[C@H]1C[C@@H]1[C@H](NP(=O)(c1ccccc1)c1ccccc1)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?