1 IGP Indole-3-glycerol phosphate 1.000 2 IPL Indole-3-propanol phosphate 0.895 3 FIP 5-fluoroindole propanol phosphate 0.850 4 IG2 (2s,3s)-2,3-dihydroxy-3-(1h-imidazol-5-yl)propyl dihydrogen phosphate 0.700 5 IYP (2r,3s)-2,3-dihydroxy-3-(1h-imidazol-5-yl)propyl dihydrogen phosphate 0.700