Using O=CO, NC(=O)c1ncc(N2CCC[C@@H](N)C2)nc1Nc1ccc(C2CCN(C3CCCC3)CC2)cc1 to produce NC(=O)c1ncc(N2CCC[C@@H](NC=O)C2)nc1Nc1ccc(C2CCN(C3CCCC3)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.