Using CC(=O)N[C@@H]1[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O[C@H]1NC(=O)C[C@H](N)C(=O)OC(C)(C)C to produce CC(=O)OC[C@H]1O[C@@H](NC(=O)C[C@H](N)C(=O)OC(C)(C)C)[C@H](OC(C)=O)[C@@H](OC(C)=O)[C@@H]1OC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.