Abstract
Antioxidative activity of constituents from ethyl acetate extract of bamboo shoots sheath was studied by the following procedures. The extracts were silica gel column chromatographed using the solvent system of hexaneethyl acetate-methanol and moreover, antioxidative fractions were purified by ODS-HPLC using the elution solvent system of HH2O-methanol. Antioxidative activity of thus obtained fractions were examined by the POV method. As the results, two antioxidative constituents of I and II were isolated and identified as Tricin and Taxifolin for the first time, respectively. The antioxidative activities of I and II were about 10% and 1% of that of a-Tocopherol, respectively.
