Using CC(C)(C)OC(=O)NC[C@H](Cc1ccccc1)NC(=O)c1cc(Br)cs1, N[C@@H](Cc1ccc(Cl)cc1Cl)CN1C(=O)c2ccccc2C1=O to produce CC(C)(C)OC(=O)NC[C@H](Cc1ccccc1)NC(=O)c1cc(Br)c(Cl)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.