Ethyl 3-chloro-5-fluoro-4-(trifluoromethoxy)pyridine-2-carboxylate
4-(Difluoromethyl)-2-methoxy-3-nitropyridine-6-sulfonyl chloride
Ethyl 4-cyano-5-(difluoromethyl)nicotinate
Ethyl 3-(bromomethyl)-4-(difluoromethyl)-2-(trifluoromethyl)pyridine-5-carboxylate