Ethyl 5-bromo-4-(difluoromethyl)-2-hydroxypyridine-3-carboxylate
Ethyl 2-bromo-6-(difluoromethyl)-5-methylpyridine-3-acetate
Ethyl 5-bromo-4-(difluoromethyl)-3-hydroxypyridine-2-carboxylate
Ethyl 3-bromo-4-(difluoromethyl)-2-hydroxypyridine-6-carboxylate