| 摘要 |
NEW MATERIAL:Substance Eu-89-NF having the following physico-chemical properties. Shape; white powder. Melting point; 158-164 deg.C. Elementary analysis (%); C, 58.96; H, 5.62; N, 0.00. Molecular weight; 501 (M+H)<+>. Molecular composition formula; C26H29O10, 501.1754. Color reaction; positive to the FeCl3 reaction and negative to the ninhydrin reaction, etc. Solubility; insoluble in hexane, diethyl ether and water, slightly sparingly soluble in chloroform and methanol and soluble in pyridine, dimethyl sulfoxide, etc. USE:A glucosyltransferase inhibitor. PREPARATION:A dried material, such as root, trunk or branch, of a plant belonging to the genus Eucalyptus of the family Myrtaceae is extracted with benzene, etc., and the resultant extracted raw material is dried and further extracted with methanol, etc. water is then added to the extract, suspended, extracted with ethyl ether, etc., separated and purified using column chromatography. |
