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