Using CC(C)C[C@H](NC(=O)OC(C)(C)C)C(=O)NCC(=O)O, Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl to produce CC(C)C[C@H](NC(=O)OC(C)(C)C)C(=O)NCC(=O)Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.