| 摘要 |
NEW MATERIAL:The tannin of formula I or formula II. USE:It has antienzyme activity, and forms a bond with the enzyme protein in the body to lower the enzymatic activity. PREPARATION:The tannin of formula I or formula II can be prepared easily from the plants such as CHIYU (root of Sanguisorba officinalis), URAJIROGASHI (bark of Quercus salicina), KEIHI (bark of Cinnamon cassia), KINAHI (bark of Cinchona succirubra), MEHIRUGI (bark of Kandelia candel), KURIJUHI (bark of Castanea crenata), etc., by conventional process such as extraction with acetone, partition with ethyl acetate and water, or column chromatography, etc., according to the reaction formula. |
