[Determination of the Amino Acids in the Raw and Processed Products of Turtle Shell by HPLC Combining Pre-column Derivatization].

Objective: To establish the pre-column derivatization combining HPLC to determine the contents of the amino acids of the raw and processed products of Turtle shell.

Methods: The samples were prepared by the acidic hydrolysis method, derivatized by OPA and FMOC, and analyzed by C18 column with gradient elution.

Results: 18 kinds of amino acids were separated within 38 min, which showed a good linear relationship( r ≥0.

[Study on the chemical constituents of Viscum ovalifolium].

Objective: To study the chemical constituents of Viscum ovalifolium.

Methods: The chemical constituents from Viscum ovalifolium were isolated and purified by silica gel column chromatography, polyamide column chromatography and recrystallization methods. Their structures were elucidated by physicochemical properties and spectral analysis.

[Analysis of the volatile constituents from Loranthus delavayi].

Objective: To study the volatile constituents of Loranthus delavayi.

Methods: The volatile constituents were extracted by steam distillation and supercritical CO2 fluid extraction, and the chemical compositions were analyzed by GC-MS techniques.

Results: Sixty-one peaks were separated and 41 of them were identified, accounting for 81.

Notoginsenoside ST-4 inhibits virus penetration of herpes simplex virus in vitro.

Further study on steam-treated notoginseng, the roots of Panax notoginseng (Burk.) F.H.

Dammarane-type glycosides from steamed notoginseng.

Notoginseng, the root of Panax notoginseng (Burk.) F. H.