Using O=S(=O)(Nc1ncc(Br)nc1Br)c1ccc(Cl)s1, COCCO to produce COCCOc1nc(Br)cnc1NS(=O)(=O)c1ccc(Cl)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.