Using CC(C)(C)C(=O)Nc1ccc2ncn3c(=O)c(C(=O)O)cnc3c2c1 to produce CC(C)(C)C(=O)Nc1ccc2ncn3c(=O)c(C(=O)[O-])cnc3c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.