Using CCOC(=O)c1cn2ncc(C#N)c(Cl)c2c1C, O=C1CCC(=O)N1Br to produce CCOC(=O)c1cn2ncc(C#N)c(Cl)c2c1CBr, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.