Ethyl 5-(bromomethyl)-4-(difluoromethyl)-3-hydroxypyridine-2-carboxylate
Ethyl 6-(bromomethyl)-4-(difluoromethyl)-3-hydroxypyridine-2-carboxylate
Ethyl 2-(bromomethyl)-3-(difluoromethyl)-4-hydroxypyridine-5-carboxylate
6-(Difluoromethyl)-3-iodo-4-methoxy-2-methylpyridine