Using C[N+](=O)[O-], CCOC(=O)C=C1CCN(C(=O)OC(C)(C)C)CC1 to produce CCOC(=O)CC1(C[N+](=O)[O-])CCN(C(=O)OC(C)(C)C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.