(E)-1-(2-(2,4-dichlorostyryl)-1-(phenylsulfonyl)-1H-indol-3-yl)-3-(dimethylamino)prop-2-en-1-one

4-hydroxy-2-(2-nitrophenyl)-9-(phenylsulfonyl)-9H-carbazole-3-carbaldehyde

4-hydroxy-2-(6-nitrobenzo[d][1,3]dioxol-5-yl)-9-(phenylsulfonyl)-9H-carbazole-3-carbaldehyde

2-(4-chloro-2-nitrophenyl)-4-hydroxy-9-(phenylsulfonyl)-9H-carbazole-3-carbaldehyde

2-(4-fluoro-2-nitrophenyl)-4-hydroxy-9-(phenylsulfonyl)-9H-carbazole-3-carbaldehyde