Analysis of genetic diversity in certified Radix Gentianae by RAPD and ISSR Highspeed Liquid Chromatographic Determination of Gentiopicroside in Radix Gentianae HPLC Fingerprint of Radix Gentianae Crassicaulis HPLC Fingerprint of Radix Gentianae Preparative separation of Gentiopicrin from Radix Gentianae by high-speed counter-current chromatography with macroporous resin Studies on anti-inflammatory effect of gentiopicroside