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