Using O=C1c2ccccc2C(=O)N1O, CC(C)(C)OC(=O)N[C@H]1C[C@@H](CO)C1 to produce CC(C)(C)OC(=O)N[C@H]1C[C@@H](CON2C(=O)c3ccccc3C2=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.