Using COC(=O)C1C[C@H](NC(=O)OC(C)(C)C)[C@H](Nc2ncc3cc(-c4c(Cl)c(OC)cc(OC)c4Cl)ccc3n2)C1 to produce COc1cc(OC)c(Cl)c(-c2ccc3nc(N[C@@H]4CC(C(=O)O)C[C@@H]4NC(=O)OC(C)(C)C)ncc3c2)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.