1-(2-ethylhexyl)-1,2-dihydro-6-hydroxy-4-methyl-2-oxonicotinonitrile

1-(2-Ethylhexyl)-2-oxo-1,2-dihydro-4-methyl-6-hydroxypyridine-3-carbonitrile

1-(2-Ethylhexyl)-1,2-dihydro-6-hydroxy-4-methyl-2-oxo-3-pyridinecarbonitrile