Using O=C1c2ccccc2C(=O)N1CCc1c[nH]c2ccc([N+](=O)[O-])cc12 to produce Nc1ccc2[nH]cc(CCN3C(=O)c4ccccc4C3=O)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.