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