3-(Difluoromethyl)-2-nitro-4-(trifluoromethoxy)pyridine-6-carboxylic acid
2-(Difluoromethyl)-5-nitro-3-(trifluoromethoxy)pyridine-4-methanol
2-(Difluoromethyl)-6-nitro-5-(trifluoromethoxy)pyridine-3-carboxylic acid
3-(Bromomethyl)-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-6-methanol