3-Pyridinecarbonitrile, 1, 2-dihydro-6-hydroxy-1, 4-dimethyl-2-oxo-5-(2-(3-((phenylsulfonyl)oxy)phenyl)diazenyl)-

3-Pyridinecarbonitrile, 1, 2-dihydro-6-hydroxy-4-methyl-2-oxo-

3-Pyridinecarbonitrile, 1, 2-dihydro-6-hydroxy-4-methyl-2-oxo-1-(2-phenylethyl)-

3-Pyridinecarbonitrile, 1, 2-dihydro-6-hydroxy-4-methyl-5-(2-(2-methyl-4-nitrophenyl)diazenyl)-2-oxo-

3-Pyridinecarbonitrile, 1, 2-dihydro-6-hydroxy-4-methyl-5-(2-(4-(4-(1-methylethyl)benzoyl)phenyl)diazenyl)-2-oxo-

3-Pyridinecarbonitrile, 1, 2-dihydro-6-hydroxy-4-methyl-5-(2-(4-methylphenyl)diazenyl)-2-oxo-

3-Pyridinecarbonitrile, 1, 2-dihydro-6-hydroxy-5-(2-(4-methoxy-2-nitrophenyl)diazenyl)-4-methyl-2-oxo-

3-Pyridinecarbonitrile, 1, 2-dihydro-6-methyl-2-oxo-

3-Pyridinecarbonitrile, 1, 4-dihydro-5-acetyl-2-mercapto-6-methyl-4-(3-nitrophenyl)-, monosodium salt

3-Pyridinecarbonitrile, 1, 4-dihydro-5-acetyl-2-mercapto-6-methyl-4-phenyl-, monosodium salt

3-Pyridinecarbonitrile, 1, 4-dihydro-5-acetyl-4-(4-chlorophenyl)-6-methyl-2-(methylthio)-

3-Pyridinecarbonitrile, 1, 4-dihydro-5-acetyl-6-methyl-2-(methylthio)-4-(3-nitrophenyl)-

3-Pyridinecarbonitrile, 1, 4-dihydro-5-acetyl-6-methyl-2-(methylthio)-4-phenyl-

3-Pyridinecarbonitrile, 1, 6-dihydro-1-methyl-6-oxo-

3-Pyridinecarbonitrile, 1-(2-ethylhexyl)-1, 2-dihydro-6-hydroxy-5-(2-(4-methoxy-2-nitrophenyl)diazenyl)-4-methyl-2-oxo-

3-Pyridinecarbonitrile, 1-(4-aminophenyl)-1, 2-dihydro-6-hydroxy-4-methyl-2-oxo-

3-Pyridinecarbonitrile, 1-butyl-1, 2-dihydro-6-hydroxy-4-methyl-2-oxo-

3-Pyridinecarbonitrile, 1-butyl-5-(2-(4-chloro-2-nitrophenyl)diazenyl)-1, 6-dihydro-2-hydroxy-4-methyl-6-oxo-

3-Pyridinecarbonitrile, 1-ethyl-1, 2-dihydro-6-hydroxy-4-methyl-2-oxo-

3-Pyridinecarbonitrile, 1-ethyl-1, 2-dihydro-6-hydroxy-4-methyl-5-(2-(2-nitrophenyl)diazenyl)-2-oxo-