3-Cyano-1-(2-ethylhexyl)-6-hydroxy-4-methyl-5-(2-nitrophenylazo)pyridin-2(1H)-one

1-(2-ethylhexyl)-1,2-dihydro-6-hydroxy-4-methyl-5-[(2-nitrophenyl)azo]-2-oxonicotinonitrile

1-(2-ethylhexyl)-1,2-dihydro-6-hydroxy-4-methyl-5-[(2-nitrophenyl)azo]-2-oxo-3-pyridinecarbonitril

1-(2-ethylhexyl)-1,2-dihydro-6-hydroxy-4-methyl-5-[(2-nitrophenyl) azo]-2-oxo-3-Pyridinecarbonitrile