Using Cc1ccc(CC(=O)OC(C)(C)C)c(C(=O)OC(C)(C)C)c1, O=C1CCC(=O)N1Br to produce CC(C)(C)OC(=O)Cc1ccc(CBr)cc1C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.