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