Using CCOC(=O)Cc1ccc(Br)cc1, CCCC[Sn](CCCC)(CCCC)c1cccs1 to produce CCOC(=O)Cc1ccc(-c2cccs2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.