Using CCOC(=O)c1c[nH]c2nc(N3CCN(C(C)=O)CC3)ncc2c1=O to produce O=C(O)c1c[nH]c2nc(N3CCNCC3)ncc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.