Methyl 2-cyano-3-nitro-4-(trifluoromethoxy)pyridine-6-carboxylate
3-(Difluoromethyl)-4-fluoro-2-(trifluoromethoxy)pyridine-5-carboxylic acid
3-Cyano-6-nitro-2-(trifluoromethoxy)pyridine-5-carboxylic acid
3-(Difluoromethyl)-2-fluoro-5-(trifluoromethoxy)pyridine-6-carboxylic acid