3-(Difluoromethyl)-2-hydroxy-4-nitropyridine-6-carboxylic acid
Ethyl 2-(difluoromethyl)-6-hydroxy-3-nitropyridine-4-carboxylate
Ethyl 2-(difluoromethyl)-3-hydroxy-4-nitropyridine-5-carboxylate
3-(Difluoromethyl)-6-hydroxy-4-nitropyridine-2-acetic acid