Using COc1cc(C[P+](c2ccccc2)(c2ccccc2)c2ccccc2)cc(OC)c1, CC(=O)CCc1ccccc1 to produce COc1cc(C=C(C)CCc2ccccc2)cc(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.