3-Methyl-4-oxo-4,7-dihydroisothiazolo[5,4-b]pyridine-5-carboxylic acid
Ethyl 3-methyl-4-oxo-4,7-dihydroisothiazolo[5,4-b]pyridine-5-carboxylate
[1,2,4]Triazolo[4,3-a]pyridine-3-carboxylic acid
Ethyl 7-cyanoimidazo[1,2-a]pyridine-3-carboxylate
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