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