3-(Difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-6-sulfonyl chloride
3-Chloro-5-iodo-4-(trifluoromethoxy)pyridine-2-sulfonyl chloride
6-Hydroxy-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
Ethyl 5-amino-3-cyano-4-(difluoromethyl)pyridine-2-carboxylate