Using CCOC(=O)CC(C)C(=O)c1ccc(OC2CCN(C(=O)OC(C)(C)C)CC2)cc1 to produce CC(CC(=O)O)C(=O)c1ccc(OC2CCN(C(=O)OC(C)(C)C)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.