Methyl 5-(chloromethyl)-3-(difluoromethyl)-2-hydroxypyridine-4-carboxylate
2-(Difluoromethyl)-3-hydroxy-6-nitropyridine-4-acetic acid
Methyl 3-(chloromethyl)-2-(difluoromethyl)-5-hydroxypyridine-4-carboxylate
Methyl 6-(chloromethyl)-2-(difluoromethyl)-3-hydroxypyridine-4-carboxylate