Using COCCOCCBr, COc1ccc(O)c2c1C(=O)N(Cc1ccccc1)S2=O to produce COCCOCCOc1ccc(OC)c2c1S(=O)N(Cc1ccccc1)C2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.