Using C=CCN1CC2C(C1=O)C2(C)c1cccc([N+](=O)[O-])c1 to produce C=CCN1CC2C(C1=O)C2(C)c1cccc(N)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.