Using O=C1Nc2ccc(Cl)cc2C1=O, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)CN1C(=O)C(=O)c2cc(Cl)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.