4-(Difluoromethyl)-3-fluoro-2-nitro-5-(trifluoromethoxy)pyridine
5-(Difluoromethyl)-4-fluoro-3-nitro-2-(trifluoromethoxy)pyridine
6-(Difluoromethyl)-2-fluoro-4-nitro-3-(trifluoromethoxy)pyridine
Methyl 4-hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine-6-carboxylate