Using CC(C)C[C@H]1[C@@H](O)CC(=O)N1C(=O)OC(C)(C)C, [OH-] to produce CC(C)C[C@H](NC(=O)OC(C)(C)C)[C@@H](O)CC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.