Methyl 4-(aminomethyl)-2-(difluoromethyl)-3-hydroxypyridine-6-acetate
3-(Chloromethyl)-6-(difluoromethyl)-2-hydroxy-4-nitropyridine
Methyl 3-(aminomethyl)-5-(difluoromethyl)-6-hydroxypyridine-2-acetate
6-(Bromomethyl)-3-(difluoromethyl)-2-hydroxypyridine-4-carboxylic acid