吲哚-2,4-二甲酸

6,7,8,9-Tetrahydro-5H-carbazole-2-carboxylic acid

6,7,8,9-tetrahydro-5H-carbazole-4-carboxylic acid

3-(4,5-二氢-3-甲基-5-氧代-1H-吡唑-1-基)苯甲酸