Using Oc1cccnc1, CC1COC(c2ccc(Cl)cc2Cl)(c2ccccc2Br)O1 to produce CC1COC(COc2cccnc2)(c2ccc(Cl)cc2Cl)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.