Using COc1ccc(-c2n[nH]c(=O)c3cc(OC)ccc23)cc1, O=P(Cl)(Cl)Cl to produce COc1ccc(-c2nnc(Cl)c3cc(OC)ccc23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.