Using COC(=O)[C@@H]1Cc2cc3c(cc2CN1C(=O)OC(C)(C)C)O[C@@H](c1ccc(OCc2ccc(Cl)c(Cl)c2)cc1)C(=O)N3C to produce COC(=O)[C@@H]1Cc2cc3c(cc2CN1)O[C@@H](c1ccc(OCc2ccc(Cl)c(Cl)c2)cc1)C(=O)N3C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.