7-(1-羧基乙基)-2-甲基-4-氧代-4,7-二氢噻吩并[2,3-b]吡啶-5-羧酸

7-(3-羧基丙基)-2-甲基-4-氧代-4,7-二氢噻吩并[2,3-b]吡啶-5-羧酸

7-(3-羟基丙基)-2-甲基-4-氧代-4,7-二氢噻吩并[2,3-b]吡啶-5-羧酸

7-[2-(dimethylamino)ethyl]-2-methyl-4-oxothieno[2,3-b]pyridine-5-carboxylic acid

7-[2-(diethylamino)ethyl]-2-methyl-4-oxothieno[2,3-b]pyridine-5-carboxylic acid