4-(Difluoromethyl)-3-methyl-2-(trifluoromethoxy)pyridine-6-carboxylic acid
2-Hydroxy-4-(trifluoromethoxy)pyridine-6-carboxylic acid
2-Iodo-3-nitro-5-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-2-methyl-6-(trifluoromethoxy)pyridine-3-carboxylic acid