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