6-氧代-1-苯基-1,4,5,6-四氢-吡嗪-3-羧酸

4-氢过氧基-4-氧代丁酸

1,2,5,6,11,11b-hexahydroindolizino[8,7-b]indol-3-one

3-(carboxymethyl)-1H-indole-2-carboxylic acid

异柠檬酸