Using O=C(c1ccccc1)N1CCN(c2cccc([N+](=O)[O-])c2)CC1 to produce Nc1cccc(N2CCN(C(=O)c3ccccc3)CC2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.