Using Cc1cccc(CC(=O)c2ccc3nnn(C)c3c2)n1, O=C([O-])O to produce Cc1cccc(C(=O)C(=O)c2ccc3nnn(C)c3c2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.