Bergenin HPLC Determination of Two Species of Bergenia growing in Tibet Studies on the Chemical Constituents of Ardisia crenata Sims Studies on the Chemical Constituents in Radix Astilbes Chinensis Chemical constituents from rhizomes of Bergenia scopulosa (II) Chemical constituents from rhizomes of Bergenia scopulosa (II) Study on constituents in rhizome of Astilbe chinensis Chemical constituents from aereal parts of Symplocos chinensis Chemical constituents from Rhodiola wallichiana var. cholaensis (I) Studies on the Chemical Constituents of Tibetan Medicinal Herb Rhodiold kirilowii(Reg.) Reg. Quantiative Analysis of Bergenin in Herta Ardisia japonica BI by TLC-Densitttometric Method Advances in studies on resources for medicinal source plants with bergenin Studies on the Chemical Constituents of Ardisia crenata Sims Comparative studies on content of arbutin, bergenin and catechin in different part of Bergenia purpurascens and B. crassifolia