Ethyl 5-(bromomethyl)-3-(difluoromethyl)-4-methylpyridine-2-carboxylate
Ethyl 3-(bromomethyl)-5-(difluoromethyl)-4-methylpyridine-2-carboxylate
Ethyl 3-(bromomethyl)-5-(difluoromethyl)-2-methylpyridine-6-carboxylate
Ethyl 3-(bromomethyl)-5-(difluoromethyl)-2-methylpyridine-4-carboxylate