Using CC(C)(C)OC(=O)N1CCc2c(Cl)cccc21, O=C1CCC(=O)N1Br to produce CC(C)(C)OC(=O)N1CCc2c1ccc(Br)c2Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.