Using COC(=O)c1cccc2c1OC[C@H](NC(=O)[C@H](C)N(C)C(=O)OC(C)(C)C)C(=O)N2Cc1ccc(Br)c2ccccc12 to produce C[C@@H](C(=O)N[C@H]1COc2c(C(=O)O)cccc2N(Cc2ccc(Br)c3ccccc23)C1=O)N(C)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.