Using O=Cc1ccccc1, COC(=O)C(NC(=O)c1ccc(C(=O)NCc2cccc(O)c2)cc1C)P(=O)(OC)OC to produce COC(=O)/C(=C/c1ccccc1)NC(=O)c1ccc(C(=O)NCc2cccc(O)c2)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.