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2-Bromo-5-nitropyridine Pentachloropyridine 3-Nitro-2-pyridinol Clopidol 2-Chloro-3-hydroxypyridine 2-Nitrochlorobenzene 5-Chloro-2-methoxy-3-nitropyridine 5-CHLORO-2-HYDROXYPYRIDINE 5-CHLORO-3-PYRIDINAMINE 4-Chloro-2-hydroxy-3-nitropyridine