Using COc1cccc(CCNC(=O)Nc2ccc3c(c2)c(N)nn3C(=O)OC(C)(C)C)c1 to produce COc1cccc(CCNC(=O)Nc2ccc3[nH]nc(N)c3c2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.