Using COC(=O)c1cccc(OC2CCN(C(=O)CNC(=O)c3cc(-c4ccccc4)[nH]n3)CC2)c1 to produce O=C(O)c1cccc(OC2CCN(C(=O)CNC(=O)c3cc(-c4ccccc4)[nH]n3)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.