Methyl 5-amino-3-nitro-2-(trifluoromethoxy)pyridine-4-carboxylate
4-Methyl-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
5-Bromo-2-nitro-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
Ethyl 4-bromo-5-cyano-3-(trifluoromethoxy)pyridine-2-carboxylate