Using c1cc2c(s1)CCNC2, O=C(C(Br)c1ccccc1Cl)C(F)(F)F to produce O=C(C(c1ccccc1Cl)N1CCc2sccc2C1)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.