Using c1ccc([P+](c2ccccc2)(c2ccccc2)C2CCCCC2)cc1, O=Cc1ccccc1[N+](=O)[O-] to produce O=[N+]([O-])c1ccccc1C=C1CCCCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.