English Name: Indigowoad Root Latin Name: Radix Isatidis seu Baphicacanthi Pharmacological Actions: Bacteriostatic tests Indigotin content has been stated to possess inhibitory activity against cold virus and other viruses, and bacillus subtilis, bacillus coli, bacillus typhoisus, bacillus paratypoisus, shigella shigae, shigella flexneri, bacillus enteritidis. Dilution at 1:100 has been reported to kill lepospirolsis. Element: Indigotin (3H-Indol-3-one; 2-(1, 3-dihydro-3-oxo-2H-indol-2-ylidene)-1, 2-dihydro-〔482-89-3〕; C16H10O2N2; molecular weight 262；blue powder with copper-colored luster; sublimatable, soluble in anilin, nitrobenzene and oil, not soluble in water and common organic solvent), indirubin (2H-Indol-2-one, 3-(1, 3-dihydro-3-oxo-2H-indol-2-ylidene)-1, 3-dihydro-〔479-41-4〕; C16H10O2N2; molecular weight 262.26; red needle crystalline（acetone-2-butanone）; melting point 356～358? sublimatable, slightly soluble in ethanol and acetic acid, not soluble in water), β-sitosterol, γ-sitosterol, Arginine, glutamic acid, butyric acid, proline, valine, leucine, γ-aminobutyric acid, sinigrin, stachyose, carbamide, hypoxathine, uracil, salicylic acid, qingdanone and carotene. Fresh root contains compound B (C5H7O3N), C(C26H48O16) and D(C18H30O10) The leaf has been reported to contain indican, indoxyl(C8H7ON) and glucose. Other constituents in radix isatidis include lupeol, betulin and 1,8-dihydroxyl-3- methyl anthraquienone