Using CCCC[Sn](CCCC)(CCCC)c1ccccn1, O=C(c1csc(Br)c1)N1CCCCC1 to produce O=C(c1csc(-c2ccccn2)c1)N1CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.