1 DRK 3-({[(3s)-3,4-dihydroxybutyl]oxy}amino)-1h,2'H-2,3'-biindol-2'-one 1.000 2 FEF (2z,3e)-2,3'-biindole-2',3(1h,1'H)-dione 3-{O-[(3r)-3,4-dihydroxybutyl]oxime} 1.000 3 IAA ({[(3e)-2'-oxo-2',7'-dihydro-2,3'-biindol-3(7h)-ylidene]amino}oxy)acetic acid 0.793 4 IXM (z)-1h,1'H-[2,3']biindolylidene-3,2'-dione-3-oxime 0.714