Using O=P(Cl)(Cl)Cl, COc1cc2nc[nH]c(=O)c2cc1OCc1ccccc1 to produce COc1cc2ncnc(Cl)c2cc1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.