Using OCc1c(-c2c(Cl)cccc2Cl)noc1C1CC1, Oc1ccc(Br)c(Cl)c1 to produce Clc1cc(OCc2c(-c3c(Cl)cccc3Cl)noc2C2CC2)ccc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.