Using COc1ccc2c(C(O)c3ccc([N+](=O)[O-])cc3)ccnc2c1 to produce COc1ccc2c(C(=O)c3ccc([N+](=O)[O-])cc3)ccnc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.