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