COC(=O)C1(C(=O)OC)CC(=O)c2cc3c(cc2-c2c(cc(OC)c(OC)c2OC)C1)OCO3
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?