[Studies on the chemical constituents in stem rind of Wikstroemia indica].

Objective: To study the chemical constituents in stem rind of Wikstroemia indica.

Method: The constituents were isolated by column chromatographies with silica gel and ODS, and identified by NMR, MS spectra.

Result: Six compounds, daphnoretin-7-O-beta-D-glucoside (1), quercitin (2), physcion (3), kaempferol 3-rutinoside (4), D-primev-ersyl genkwanine (5), and anabellamide (6) were isolated and identified.

[Determination of four components in root of Saposhnikovia divaricata by HPLC gradient elution].

Objective: To develop an HPLC method for determination of components in root of Saposhnikovia divaricata.

Method: The separation of four components was achieved on a reversed-phase Alltima C18 column with MeOH-H2O gradient elution at a flow rate of 1.0 mL x min(-1).

[A new dicoumarin from stem bark of Wikstroemia indica].

Objective: To study the chemical constituents form stem bark of Wikstroemia indica.

Method: The constituents were isolated by column chromatography on silica gel and ODS, and identified by spectroscopic methods.

Result: Seven compounds, daphnoretin (I), tricin (II), daucosterol (III), beta-sitosterol (IV), umbelliferone (V), genkwanin (VI), and 6'-hydroxy, 7-O-7'-dicoumarin (VII), were isolated and identified.

[Studies on quality standard of Peucedanum praeruptorum].

Objective: To establish a quality standard of Peucedanum praeruptorum for Chinese Pharmacopoeia (2005).

Method: The presence of (+/-)-praeruptorin A were identified and assayed by TLC and HPLC, respectively.

Result: Linearity of marker was obtained over the range of 0.