2-Amino-6-(difluoromethyl)-5-hydroxy-3-nitropyridine
6-Amino-2-(difluoromethyl)-4-hydroxy-3-nitropyridine
2-Amino-6-(difluoromethyl)-4-hydroxy-3-nitropyridine
4-Bromo-5-chloro-3-(difluoromethyl)-2-hydroxypyridine
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