2-羟基-5,6,7,8-四氢咔唑

2,2-dimethyl-5-(2-methylindol-3-ylmethylene)-1,3-dioxane-4,6-dione

7-ethoxy-1,2,3,4-tetrahydro-carbazole

3-乙氧基苯基肼

环己酮