Using C[P+](c1ccccc1)(c1ccccc1)c1ccccc1, COC(=O)CCC(=O)c1ccc(Cl)c(Cl)c1 to produce C=C(CCC(=O)OC)c1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.