Using CCOC(=O)CN1c2ccc(Cl)c(Cl)c2[C@@H]2CCN(C(=O)OC(C)(C)C)CC[C@@H]21 to produce CC(C)(C)OC(=O)N1CC[C@H]2c3c(ccc(Cl)c3Cl)N(CC(=O)O)[C@H]2CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.