Chemical constituents twigs and leaves of Melodinus fusiformis Chemical constituents in twigs and leaves of Melodinus fusiformis Chemical constituents of Agrimoniae Herba Process routing design on structure modifier of A-ring cleavage of ursolic acid Chemical constituents of Agrimoniae Herba In vitro characteristic evaluation of ursolic acid co-crystal solid dispersions Determination of deoxyschizandrin, schisandrin b, schisandrin c, and ursolic acid in Baogan Pill by RP-HPLC Simultaneous determination of four active componentsin Spica Prunellae by HPLC In vitro antirotaviral effects of quercetin and 2α-hydroxyursolic acid extracted from Psidium guajava leaves Advances in studies on three pentacyclic triterpenoids and their derivatives against ADIS Determination of six triterpene acid contents in effective fraction of Eriobotryae Folium by quantitative analysis of multi-components by single-marker