Ethyl 2-(difluoromethyl)-3-fluoro-6-methoxypyridine-4-carboxylate
Methyl 4-(difluoromethyl)-3-fluoro-6-methoxypyridine-2-carboxylate
Methyl 4-(difluoromethyl)-3-fluoro-2-methoxypyridine-6-carboxylate
4-(Difluoromethyl)-2-fluoro-3-methoxypyridine-6-acetic acid