Methyl 3-(difluoromethyl)-4-methoxy-5-methylpyridine-2-carboxylate
Methyl 3-(difluoromethyl)-2-methoxy-6-methylpyridine-5-carboxylate
Methyl 6-(difluoromethyl)-2-methoxy-3-methylpyridine-4-carboxylate
Methyl 2-(difluoromethyl)-5-methoxy-6-methylpyridine-3-carboxylate