1,2-Dihydro-6-hydroxy-4-methyl-2-oxo-5-((p-tolyl)azo)nicotinonitrile 3-Pyridinecarbonitrile, 1,2-dihydro-6-hydroxy-4-methyl-5-((4-methylphenyl)azo)-2-oxo- 75113-55-2 EINECS 278-070-9