Ethyl 2-amino-5-(chloromethyl)-6-(trifluoromethoxy)pyridine-3-carboxylate
4-Bromo-5-chloro-2-(difluoromethyl)-3-(trifluoromethyl)pyridine
3-Bromo-2-iodopyridine-5-sulfonyl chloride
2-Chloro-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-carboxylic acid