Using BrCCBr, COC(=O)C(Cc1ccc(O)cc1)Nc1ccccc1C(=O)c1cccnc1 to produce COC(=O)C(Cc1ccc(OCCBr)cc1)Nc1ccccc1C(=O)c1cccnc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.