5-(Bromomethyl)-3-(difluoromethyl)-2-hydroxy-4-nitropyridine
6-(Difluoromethyl)-3-hydroxy-2-nitro-4-(trifluoromethyl)pyridine
3-(Difluoromethyl)-4-hydroxy-6-nitropyridine-2-carbonyl chloride
2-(Bromomethyl)-3-(difluoromethyl)-5-hydroxypyridine-6-carboxylic acid