Using CC(C)(C)C(=O)OCBr, CC(=O)OC1=C(C(=O)[O-])N2C(=O)CC2C1 to produce CC(=O)OC1=C(C(=O)OCOC(=O)C(C)(C)C)N2C(=O)CC2C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.