Using O=C1N[C@@H]2[C@@H](OC(=O)c3ccccc3)[C@H](OC(=O)c3ccccc3)[C@@H](CO)C[C@@H]2O1 to produce O=C[C@H]1C[C@@H]2OC(=O)N[C@@H]2[C@@H](OC(=O)c2ccccc2)[C@@H]1OC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.