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