Using CC1(C)OC(=O)CC(=O)O1, O=C(CBr)c1ccc(Br)cc1 to produce CC1(C)OC(=O)C(CC(=O)c2ccc(Br)cc2)C(=O)O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.