Ethyl 3-(difluoromethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine-5-acetate
Ethyl 3-(difluoromethyl)-2-hydroxy-5-(trifluoromethoxy)pyridine-4-acetate
2-Iodo-3-methoxy-5-nitro-6-(trifluoromethoxy)pyridine
Ethyl 6-(difluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-4-acetate