4,7-Dibromo-3h-[1,2,3]triazolo[4,5-c]pyridine
7-Bromo-4-chloro-[1,2,5]thiadiazolo[3,4-c]pyridine
6-Chlorothieno[2,3-b]pyridine-2-carboxylic acid
Ethyl 6-hydroxythieno[2,3-b]pyridine-2-carboxylate
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