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