Using COc1ccc(C(=O)NC2(C(=O)O)Cc3ccccc3C2)cc1C(=O)c1ccccc1C to produce COc1ccc(C(=O)NC2(C(=O)O)Cc3ccccc3C2)cc1C(O)c1ccccc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.