Chemical constituents in unsaponifiable matter from seeds of Trichosanthes hupehensis Advances in studies on absorption characteristics of pentacyclic triterpenes Studies on the Chemical Constituents of Pyrus Communis Chemical constituents of Sabia parviflora The pentacyclic triterpene of Ainsliaea yunnanensis Research progress on pharmacological effects of asiatic acid and its structural modification Studies on Chemical Constituents from the Stems of Schisandra sphaerandra Chemical constituents of unsaponifiable matter from seed oil of Momordica cochinchinensis Advances in studies Off biological activities of asiatic acid and its derivatives