Ethyl 2,3,5,6-tetrafluoro-4-pyridinecarboxylate
2-(Bromomethyl)-3-(difluoromethyl)-6-fluoro-5-(trifluoromethoxy)pyridine
2-(Bromomethyl)-4-(difluoromethyl)-6-iodopyridine-3-carboxylic acid
2-Chloro-5-(difluoromethyl)-3-hydroxypyridine-6-carbonyl chloride