title: New rearranged clerodane diterpenes from Tinospora baenzigeri.
abstract: Baenzigeroside B, a new rearranged clerodane diterpene glucoside, was isolated from the stems of Tinospora baenzigeri. The aglycone of baenzigeroside B, baenzigeride B (isolated as its acetate), was found together with baenzigeride A, baenzigerosides A and B in the leaves of the same plant. Baenzigeride B and baenzigeroside B are the first examples of a new class of rearranged clerodane diterpenes. The possible biogenesis of the compounds is discussed.
authors.affiliation: Department of Chemistry Faculty of Science, Silpakorn University, Nakorn Pathom, Thailand. pittayat@su.ac.th
authors.forename: P
authors.initials: P
authors.lastname: Tuntiwachwuttikul
authors.forename: W C
authors.initials: WC
authors.lastname: Taylor
mesh_terms: D000107:Acetylation; D000818:Animals; D000962:Antimalarials / Q000737:chemistry* / Q000302:isolation & purification; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification; D006575:Heterocyclic Compounds, 3-Ring / Q000737:chemistry / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D029583:Menispermaceae / Q000737:chemistry*; D008968:Molecular Conformation; D010084:Oxidation-Reduction; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D010963:Plasmodium falciparum / Q000187:drug effects; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013785:Thailand
chemical_list: D000962:Antimalarials; D004224:Diterpenes; D005960:Glucosides; D006575:Heterocyclic Compounds, 3-Ring; C440196:baenzigeroside B