Using O=C1CN(c2ccc([N+](=O)[O-])cn2)CCN1Cc1ccccc1 to produce Nc1ccc(N2CCN(Cc3ccccc3)C(=O)C2)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.