title: [Studies on chemical constituents of Tinospora hainanesis].
abstract: Tinospora hainanesis is a new species of Menispermaceae plant. It is used as folk remedy for joint pain and physical injury. Five compounds were isolated from the vine stalk of Tinospora hainanesis. By spectral analysis and chemical methods, the structures of the compounds were identified as makisterone A (I), 2,3-dimethoxy-9,10-dihydroxy-N-methyltetrahydroproto-berberine quaternary salt (II), palmatine (III), beta-amyrin (IV) and docosyl ferulate (V). II is a new quaternary alkaloid named as haitinosporine. I, IV and V were isolated for the first time from the plants of Tinospora genus.
authors.affiliation: Hainan Medical College, Haikou 570102.
authors.forename: Y
authors.initials: Y
authors.lastname: Guo
authors.forename: L
authors.initials: L
authors.lastname: Lin
authors.forename: J
authors.initials: J
authors.lastname: Shen
mesh_terms: D001600:Berberine Alkaloids / Q000737:chemistry / Q000302:isolation & purification; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000031:analogs & derivatives; D018520:Plant Shoots / Q000737:chemistry; D031610:Tinospora / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D001600:Berberine Alkaloids; D004365:Drugs, Chinese Herbal; D014315:Triterpenes; C470015:haitinosporine; D009828:Oleanolic Acid; C036380:beta-amyrin