Methyl 5-cyano-4-nitro-3-(trifluoromethoxy)pyridine-2-acetate
4-(Difluoromethyl)-5-fluoro-3-(trifluoromethoxy)pyridine-2-methanol
5-Cyano-2-(difluoromethyl)-4-nitro-3-(trifluoromethoxy)pyridine
Methyl 3-cyano-4-nitro-2-(trifluoromethoxy)pyridine-5-acetate