Using C[Sn](C)(C)C, CCCCOC(=O)c1nc(Br)c2snc(C)c2c1O to produce CCCCOC(=O)c1nc(C)c2snc(C)c2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.