Using CCOC(=O)C1=C(c2ccc3c(c2)OCO3)c2ccccc2C1(O)c1ccc(OC)cc1 to produce COc1ccc(C2c3ccccc3C(c3ccc4c(c3)OCO4)C2C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.