Chemical constituents of Swertia macrosperma Preliminary comparative study of swertiamarin and swertisin on three kinds of Digeda-species Mongolian medicinal materials Simultaneous determination of four constituents in wild Gentiana lawrencei from Qinghai province by RP-HPLC Simultaneous determination of four constituents in wild Gentiana lawrencei from Qinghai province by RP-HPLC Determination of iridoids and triterpenes in herb of Swertia pseudochinesis by RP-HPLC Simultaneous determination of six main constituents in Swertia of Qinghai province and Sichuan province by HPLC Biotransformation optimization of swertiamarin by Aspergillus niger Biotransformation optimization of swertiamarin by Aspergillus niger Contents of seven indicative constituents in seven kinds of Gentiana macrophylla by UPLC Determination of seven components in flowers of Gentiana tibetica and Gentiana dendrologi by HPLC Chemical constituents from flower of Gentiana tibetica Dynamic Changes in Terpenoid Contents in Gentiana rigescens Determination of five active constituents in aerial part of Tibetanmedicine Gentiana straminea by HPLC HPLC Determination of Contents of Four Active Constituents in Tibetan Medicine Gentiana straminea ( Gentianaceae) During Different Growing Period