Using NC(=O)C(=O)NC(C(=O)OC(c1ccccc1)c1ccccc1)c1ccccc1 to produce NC(=O)C(=O)NC(C(=O)O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.