Using CC(Cc1ccc(O)c(O)c1)N1CC(c2cccc(Cl)c2)OC1=O, NC(=O)C(Br)(Br)C(N)=O to produce CC(Cc1ccc2c(c1)OC(C(N)=O)(C(N)=O)O2)N1CC(c2cccc(Cl)c2)OC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.