Using COc1ccc(CN2C(=O)c3cc(OC)ccc3C2P(=O)(c2ccccc2)c2ccccc2)cc1 to produce COc1ccc(CN2Cc3ccc(OC)cc3C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.