Using O=C([O-])[O-], O=C(c1cncc(Br)c1)c1c[nH]c2ncnc(Cl)c12 to produce Cn1cc(C(=O)c2cncc(Br)c2)c2c(Cl)ncnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.