Using O=C1CCC(=O)N1C(=O)OCC1c2ccccc2-c2ccccc21, CCCC[C@H](N)[C@H](O)C(=O)OC(C)(C)C to produce CCCC[C@H](NC(=O)OCC1c2ccccc2-c2ccccc21)[C@H](O)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.