Methyl 3-cyano-2-methyl-6-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 4-(chloromethyl)-2-(difluoromethyl)pyridine-5-acetate
4-Chloro-5-nitro-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-(Difluoromethyl)-2-methoxy-4-nitropyridine-5-sulfonyl chloride