Using O=C(Nc1cc(-c2ccoc2)ccc1C(=O)O)c1cc(-c2cccnc2)ccc1O to produce O=C(Nc1cc(-c2ccoc2)ccc1C(=O)[O-])c1cc(-c2cccnc2)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.