吲哚-2-羧酸乙酯

2-methyl-3H-pyrazino[1,2-a]indole-1,4-dione

5,7-dihydroindolo[3,2-b][1,5]benzothiazepin-6-one

3-甲基吲哚

β-咔啉-3-羧酸乙酯