[Phenolic compounds isolated from rhizoma of Aster tataricus].

Objective: To study the chemical constituents in root and rhizome of Aster tataricus.

Methods: Compounds were isolated and purified by silica gel and sephadex LH-20 column chromatography. Their structures were identified by physicochemical properties and spectral analysis.

[Determination of calycosin-7-O-beta-D-glucopyranoside in radix astragali by HPLC].

Objective: TO establish a RP-HPLC method for the determination of calycosin-7-O-beta-D-glucopyranoside in Radix Astragali, and to analyse the calycosin-7-O-beta-D-glucopyranoside content of ten samples of Radix Astragali, collected from different regions.

Method: A Polaris C18(250 mm x 4.6 mm, 5 microns) column was used and a mixture of methanol-water (30:70) was used as the mobile phase at a flow rate of 1.