3-amino-4,6-dimethyl-thieno[2,3-b]pyridine-2-carboxylic acid, potassium salt

(3-hydroxy-4-methyl-4,7-dihydro-5H-thieno[2,3-b]pyridin-6-ylidene)-acetic acid methyl ester

((Z)-4-methyl-6-thioxo-piperidin-2-ylidene)-acetic acid methyl ester

3-氨基-4,6-二甲基噻吩并[2,3-b]吡啶-2-羧酸

3-氨基-4,6-二甲基噻吩并[2,3-b]吡啶-2-羧酸乙酯