Using COc1ccc(CCNCC(O)COc2cccc(N)c2N)cc1OC, O=N[O-] to produce COc1ccc(CCNCC(O)COc2cccc3[nH]nnc23)cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.