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