Using CC(C)(C)OC(=O)NC[C@H]1CC[C@H](C(=O)O)CC1, CNOC to produce CON(C)C(=O)[C@H]1CC[C@H](CNC(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.