Using CC(C)C[C@@H](C(=O)NN(c1ccccc1)S(C)(=O)=O)[C@H](CN1C(=O)c2ccccc2C1=O)C(=O)OC(C)(C)C, CO to produce CC(C)(C)C[C@@H](C(=O)NN(c1ccccc1)S(C)(=O)=O)[C@H](CN)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.