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