Using CI, O=C(c1cc2ncc(Br)cn2n1)N1CCc2[nH]c(=O)sc2CC1 to produce Cn1c2c(sc1=O)CCN(C(=O)c1cc3ncc(Br)cn3n1)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.