Methyl 2-(difluoromethyl)-5-nitro-3-(trifluoromethyl)pyridine-6-carboxylate
Methyl 6-(difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-3-carboxylate
5-(Difluoromethyl)-3-nitro-4-(trifluoromethyl)pyridine-2-acetonitrile
4-(Difluoromethyl)-2-nitro-6-(trifluoromethyl)pyridine-3-methanol