2-Amino-4-(pyridin-4-yl)thiophene-3-carboxylic acid
2-Amino-4-(pyridin-3-yl)thiophene-3-carboxylic acid
Ethyl 2-amino-4-(pyridin-3-yl)thiophene-3-carboxylate
2-Amino-4-(pyridin-2-yl)thiophene-3-carboxylic acid
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