Using O=C(NCCNC(=O)OCc1ccc([N+](=O)[O-])cc1)OCc1ccc([N+](=O)[O-])cc1 to produce NCCNC(=O)OCc1ccc([N+](=O)[O-])cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.