Using COC(=O)c1ccc(-c2cc(OCc3ccccc3)c(OC)cc2C=O)c(OC)c1 to produce COc1cc(C=O)c(-c2ccc(C(=O)O)cc2OC)cc1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.