Using CC(C)(C)OC(=O)CC(=O)OC(C)(C)C, CCOC(=O)C(Br)CBr to produce CCOC(=O)C1CC1(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.