Ethyl 3-(difluoromethyl)-4-hydroxy-5-nitropyridine-2-carboxylate
Methyl 2-(difluoromethyl)-3-hydroxy-4-methylpyridine-5-acetate
Methyl 6-(difluoromethyl)-4-hydroxy-2-nitropyridine-3-acetate
4-(Difluoromethyl)-2-hydroxy-5-nitropyridine-3-acetic acid
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