Using Cn1nc(CBr)c2c(Cl)ncnc21, Oc1cccc(OCc2ccccc2)c1 to produce Cn1nc(COc2cccc(OCc3ccccc3)c2)c2c(Cl)ncnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.