Using CNc1ncccc1-c1c[nH]c2ncc(-c3cncc(C(=O)C(=O)N(C)C)c3)c(Cl)c12 to produce CNc1ncccc1-c1c[nH]c2ncc(-c3cncc(C(O)C(=O)N(C)C)c3)c(Cl)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.