3-oxo-2-(3-oxo-5-sulfo-1H-indol-2-ylidene)-1H-indole-5,7-disulfonic acid

2,2'-联吲哚

1-(2,3-Dihydro-1H,1'H-2,2'-biindol-1-yl)ethanone

1H,1'H‐2,2'--bisindol--3--yl acetate

3-羟基-1H-吲哚-2-甲醛