Using CCCC[Sn](CCCC)(CCCC)c1nccs1, O=[N+]([O-])c1scc(Br)c1Br to produce O=[N+]([O-])c1scc(Br)c1-c1nccs1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.