Using O=C(O)C(C(=O)Oc1ccccc1)c1ccccc1, CC1(C)S[C@@H]2[C@H](N)C(=O)N2[C@H]1C(=O)O to produce CC1(C)S[C@@H]2C(NC(=O)C(C(=O)Oc3ccccc3)c3ccccc3)C(=O)N2C1C(=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.