Using Nc1nnn[nH]1, O=C(O)c1cc(=O)c2c([nH]1)c(=O)oc1ccccc12 to produce O=C(Nc1nnn[nH]1)c1cc(=O)c2c([nH]1)c(=O)oc1ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.