(2S)-2-[[2-(1H-indol-3-yl)acetyl]amino]pentanedioate (2S)-2-[[2-(1H-indol-3-yl)-1-oxoethyl]amino]pentanedioate (2S)-2-[[2-(1H-indol-3-yl)acetyl]amino]glutarate (2S)-2-[2-(1H-indol-3-yl)ethanoylamino]pentanedioate ZINC04090458