Using Cn1c(O)nc(-c2ccncc2)c(-c2cccc(Br)c2)c1=O, O=P(Cl)(Cl)Cl to produce Cn1c(Cl)nc(-c2ccncc2)c(-c2cccc(Br)c2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.