Methyl 5-amino-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-carboxylate
3-Bromo-6-cyano-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
Methyl 4-amino-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-carboxylate
5-Bromo-2-cyano-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride