Ethyl 2-hydroxy-3-nitro-6-(trifluoromethoxy)pyridine-4-acetate
2-(Difluoromethyl)-4-hydroxy-6-(trifluoromethoxy)pyridine-3-acetic acid
4-Iodo-3-methyl-2-(trifluoromethoxy)pyridine-5-carboxylic acid
2-(Difluoromethyl)-4-hydroxy-3-(trifluoromethoxy)pyridine-6-acetic acid