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