Using Brc1nc2c(s1)CNCC2, O=C(CCl)N1CCN(C2CCC2)CC1 to produce O=C(CN1CCc2nc(Br)sc2C1)N1CCN(C2CCC2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.