Using [Br-], CCOC(=O)C(=O)N(CCOS(C)(=O)=O)N=Cc1ccccc1 to produce CCOC(=O)C(=O)N(CCBr)N=Cc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.