6-(4-Chlorophenyl)-4-methyl-2-oxo-1,2-dihydropyridine-3-carbonitrile
6-(4-Chlorophenyl)-2-oxo-4-phenyl-1,2-dihydropyridine-3-carbonitrile
6-(4-Bromophenyl)-4-methyl-2-oxo-1,2-dihydropyridine-3-carbonitrile
6-(3,4-Dimethoxyphenyl)-2-oxo-4-phenyl-1,2-dihydropyridine-3-carbonitrile