858852-20-7
3,5-二溴-4-羟基吡啶-2-羧酸
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698393-07-6
3,5-二溴-4-氯吡啶-2-羧酸
861019-41-2
3,5-dibromo-4-chloro-pyridine-2-carboxylic acid methyl ester