COC(=O)C1=C(C(=O)OC)C23CC1C1C(C(=O)OC)=C(C(=O)OC)C12C1C=CC3C2C(=O)OC(=O)C21
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?