Using Cc1ccc(NC(=O)Cc2nc(N3CCOCC3)cc(=O)[nH]2)c(O)c1 to produce Cc1ccc2nc(Cc3nc(N4CCOCC4)cc(=O)[nH]3)oc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.