COC(=O)c1c(OC(C)=O)ccc2c1c1c(OC(C)=O)c3ccccc3c(OC(C)=O)c1n2Cc1ccccc1
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?