Methyl 6-(difluoromethyl)-4-hydroxy-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 2-(difluoromethyl)-4-hydroxy-5-(trifluoromethoxy)pyridine-3-acetate
Methyl 6-iodo-3-nitro-2-(trifluoromethoxy)pyridine-4-acetate
Methyl 5-iodo-4-methyl-3-(trifluoromethoxy)pyridine-2-acetate