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