Using C[Sn](C)(C)c1cc(N)c2cnn(S(=O)(=O)c3ccccc3)c2c1, COc1ncc(Br)cc1NS(C)(=O)=O to produce COc1ncc(-c2cc(N)c3cnn(S(=O)(=O)c4ccccc4)c3c2)cc1NS(C)(=O)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.