Ethyl 2-(difluoromethyl)-4-fluoro-3-(trifluoromethoxy)pyridine-6-acetate
6-(Difluoromethyl)-2-fluoro-3-(trifluoromethoxy)pyridine-4-acetic acid
4-(Chloromethyl)-2-fluoro-3-nitro-6-(trifluoromethoxy)pyridine
3-(Chloromethyl)-5-fluoro-6-nitro-2-(trifluoromethoxy)pyridine