Ethyl 3-(difluoromethyl)-6-methoxypyridine-2-carboxylate
Ethyl 4-chloro-5-(difluoromethyl)pyridine-2-carboxylate
2-(Chloromethyl)-4-(difluoromethyl)-3-(trifluoromethyl)pyridine-6-sulfonyl chloride
3-(Chloromethyl)-6-(difluoromethyl)-2-(trifluoromethyl)pyridine-4-sulfonyl chloride