Using O=Cc1ccccc1, CC(C)(C)OC(=O)NCCC[C@H](N)C(=O)O to produce CC(C)(C)OC(=O)NCCC[C@H](NCc1ccccc1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.