2-(3-Bromo-2-nitropyridin-4-yl)-2-hydroxyacetic acid
2-(2-Bromo-6-nitropyridin-3-yl)-2-hydroxyacetic acid
2-(2-Bromo-5-nitropyridin-3-yl)-2-hydroxyacetic acid
2-(2-Bromo-4-nitropyridin-5-yl)-2-hydroxyacetic acid
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