Using O=C1CCOCC1, O=[N+]([O-])c1ccc(C[P+](c2ccccc2)(c2ccccc2)c2ccccc2)cc1 to produce O=[N+]([O-])c1ccc(C=C2CCOCC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.