Ethyl 2-cyano-3-nitro-4-(trifluoromethoxy)pyridine-6-carboxylate
2-Chloro-3-(difluoromethyl)-6-hydroxypyridine-4-sulfonyl chloride
2-Chloro-3-cyano-5-(difluoromethyl)pyridine-6-carbonyl chloride
3-(Difluoromethyl)-2-methoxy-5-nitropyridine-4-carbonyl chloride