Using O=C([O-])O, Cn1cc(C[C@H](N)C(=O)O)c2ccccc21 to produce Cn1cc(C[C@H](NC(=O)C=Cc2ccccc2)C(=O)O)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.