Using O=C(Nc1ccccc1C(=O)O)C(=Cc1ccccc1)C(=O)Nc1ccccc1C(=O)O to produce O=C(Nc1ccccc1C(=O)[O-])C(=Cc1ccccc1)C(=O)Nc1ccccc1C(=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.