Using CN1CCNCC1, O=C(O)CCNS(=O)(=O)c1ccccc1[N+](=O)[O-] to produce CN1CCN(C(=O)CCNS(=O)(=O)c2ccccc2[N+](=O)[O-])CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.