Using COC(=O)c1cc2ccc3c(c2c(-c2ccc4c(c2)OCO4)c1C(=O)OC)OCO3 to produce COC(=O)c1c(C(=O)O)cc2ccc3c(c2c1-c1ccc2c(c1)OCO2)OCO3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.