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