4-Amino-3-hydroxybenzenesulfonic acid diazo, and 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one coupling, a single accidentally nitrogen compounds; 3-Amino-4-hydroxybenzenesulfonamide diazo, and 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one coupling, another single accidentally nitrogen compounds, and then translate into 1:2 chromium complex.
