Using COC(=O)c1cc(C=O)c[nH]1, COC[P+](c1ccccc1)(c1ccccc1)c1ccccc1 to produce COC=Cc1c[nH]c(C(=O)OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.