Using O=Cc1cc(Cl)cnc1Oc1ccc2c(nnn2CC2CC2)c1Br to produce OCc1cc(Cl)cnc1Oc1ccc2c(nnn2CC2CC2)c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.