Using CCCC[Sn](CCCC)(CCCC)c1nccs1, NS(=O)(=O)c1cnc(OCC2CCOCC2)c(Br)c1 to produce NS(=O)(=O)c1cnc(OCC2CCOCC2)c(-c2nccs2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.