Using c1ccc(Cn2nc(Nc3ccccc3)c3c(Nc4ccccc4)ncnc32)cc1 to produce c1ccc(Nc2ncnc3[nH]nc(Nc4ccccc4)c23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.