Using NOCc1ccc(Br)c(O)c1, O=CNc1nc(C(=O)C(=O)O)cs1 to produce O=CNc1nc(C(=NOCc2ccc(Br)c(O)c2)C(=O)O)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.