5-Chloro-1H-pyrrolo[3,2-b]pyridine-3-carboxylic acid
6-Bromo-[2,3'-bipyridine]-5'-carboxylic acid
3,6-Dibromo-5-methoxy-1H-pyrrolo[3,2-b]pyridine
2,5-Dibromo-3,4-dimethylpyridine
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