Using O=P(Cl)(Cl)Cl, O=c1[nH]c2c(Br)cccc2c(=O)n1C1CCOCC1 to produce O=c1c2cccc(Br)c2nc(Cl)n1C1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.