Using COC(=O)[C@@H](N)Cc1c[nH]c2ccccc12, CC(C)=CC(=O)O to produce COC(=O)[C@H](Cc1c[nH]c2ccccc12)NC(=O)C=C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.