4-(Difluoromethyl)-6-nitro-2-(trifluoromethyl)pyridine-3-carboxylic acid
5-(Difluoromethyl)-3-nitro-2-(trifluoromethyl)pyridine-4-carboxylic acid
3-(Difluoromethyl)-5-nitro-4-(trifluoromethyl)pyridine-2-carboxylic acid
3-(Difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-6-carboxaldehyde