Using CCOC(=O)c1cnc(-c2cccn2C(=O)OC(C)(C)C)s1, O=C1CCC(=O)N1Br to produce CCOC(=O)c1cnc(-c2ccc(Br)n2C(=O)OC(C)(C)C)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.