Using Clc1ncc(Br)c(Cl)n1, CCCC[Sn](CCCC)(CCCC)c1c(C)noc1C to produce Cc1noc(C)c1-c1nc(Cl)ncc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.