Using CCCC[Sn](CCCC)(CCCC)c1cccs1, O=[N+]([O-])c1cc2c(c(Br)c1[N+](=O)[O-])NSN2Br to produce O=[N+]([O-])c1cc2c(c(-c3cccs3)c1[N+](=O)[O-])NSN2c1cccs1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.