Using CI, CC1(C)CNC(=O)N1c1nc2c(s1)CCOc1cc(Br)ccc1-2 to produce CN1CC(C)(C)N(c2nc3c(s2)CCOc2cc(Br)ccc2-3)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.