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