5-(Difluoromethyl)-2-hydroxy-3-methylpyridine-4-sulfonamide
Methyl 4-(difluoromethyl)-6-hydroxy-2-methoxypyridine-3-carboxylate
Methyl 3-(difluoromethyl)-2-hydroxy-5-methoxypyridine-4-carboxylate
Methyl 2-(difluoromethyl)-4-hydroxy-5-methoxypyridine-3-carboxylate