Using On1nnc2ccccc21, O=C(N[C@H]1CC[C@H](C(=O)O)CC1)OCc1ccccc1 to produce NNC(=O)[C@H]1CC[C@H](NC(=O)OCc2ccccc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.