Using O=C(CBr)c1ccc(Cl)cc1Cl, Nc1cccc(N2CC(=O)NS2(=O)=O)c1 to produce O=C1CN(c2cccc(NCC(=O)c3ccc(Cl)cc3Cl)c2)S(=O)(=O)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.