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