Using O=C(O)CC[P+](c1ccccc1)(c1ccccc1)c1ccccc1, COc1cc(C=O)cc(OC)c1 to produce COc1cc(C=CCC(=O)O)cc(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.