Using CCOC(=O)CNCCN(CCc1ccc([N+](=O)[O-])cc1)C(=O)OC(C)(C)C to produce O=C1CNCCN1CCc1ccc([N+](=O)[O-])cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.