Using Cc1cccc(C2CC2)c1Oc1nnc(Cl)cc1O, O=C1CCC(=O)N1Br to produce Cc1cccc(C2CC2)c1Oc1nnc(Cl)c(Br)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.