Using O=Cc1ccco1, O=C(O)CCCCCCC[P+](c1ccccc1)(c1ccccc1)c1ccccc1 to produce O=C(O)CCCCCCC=Cc1ccco1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.