Using C[C@@H]1CC[C@H](C)N1C(=O)C1(NC(=O)OC(C)(C)C)CCCC1 to produce C[C@@H]1CC[C@H](C)N1C(=O)C1(N)CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.