4-Chloro-2-nitro-6-(trifluoromethoxy)pyridine-3-sulfonyl chloride
2-Bromo-5-(difluoromethyl)-3-(trifluoromethoxy)pyridine-6-acetic acid
4-Chloro-2-nitro-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
3-Chloro-4-nitro-6-(trifluoromethoxy)pyridine-2-sulfonyl chloride