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