3-(Difluoromethyl)-6-nitro-2-(trifluoromethyl)pyridine-5-sulfonamide
Methyl 5-(difluoromethyl)-4-nitro-3-(trifluoromethyl)pyridine-2-acetate
Methyl 3-(difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-6-acetate
2-(Difluoromethyl)-5-nitro-6-(trifluoromethyl)pyridine-3-acetic acid