O[C@H]1[C@H](O)[C@@H](Cn2nnc(-c3ccccc3)c2-c2ccccc2)OCO[C@@H]1Cn1nnc(-c2ccccc2)c1-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?