3-(Difluoromethyl)-4-nitro-5-(trifluoromethyl)pyridine-2-carboxamide
3-(Difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-6-carboxamide
3-(Difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-5-carboxamide
3-(Difluoromethyl)-2-nitro-6-(trifluoromethyl)pyridine-5-carboxamide