Using O=C([O-])[O-], CC(C)(C)OC(=O)N1CCC(CC(=O)O)C1 to produce COC(=O)CC1CCN(C(=O)OC(C)(C)C)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.