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