Using OB(O)c1ccncc1, O=S(=O)(Nc1ncns1)c1ccc2c(-c3ccc(Cl)cc3Br)cccc2c1 to produce O=S(=O)(Nc1ncns1)c1ccc2c(-c3ccc(Cl)cc3-c3ccncc3)cccc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.