5-(Difluoromethyl)-2-fluoro-4-nitro-3-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-5-fluoro-2-nitro-3-(trifluoromethoxy)pyridine
3-(Difluoromethyl)-5-fluoro-4-nitro-2-(trifluoromethoxy)pyridine
Methyl 2-fluoro-3-nitro-6-(trifluoromethoxy)pyridine-4-acetate