title: Ursane- and oleanane-type triterpenes from Ternstroemia gymnanthera callus tissues.
abstract: An investigation on the constituents of the callus tissues of Ternstroemia gymnanthera has led to the isolation of five phytosterols, 15 known triterpenoids, and four new triterpenoids (1-4). The new compounds were characterized by spectroscopic study as 3-epi-corosolic acid lactone (2 alpha,3 alpha-dihydroxyurs-11-en-13 beta,28-olide) (1), 3-epi-ternstroemic acid (2 alpha,3 alpha-dihydroxyurs-12-en-11-on-28-oic acid) (2), ternstroemic acid (2 alpha,3 beta-dihydroxyurs-12-en-11-on-28-oic acid) (3), and gymnantheraic acid (2 alpha,3 alpha-dihydroxy-11 alpha-methoxyurs-12-en-28-oic acid) (4). The isolated triterpenes were compared with those from actinidiaceous plant callus tissues from a chemotaxonomic point of view.
authors.affiliation: Research Institutes for Science and Technology, and Department of Biological Science and Technology, Science University of Tokyo, 2669 Yamazaki, Noda, Chiba 278-8510, Japan. ikutaaki@rs.noda.tus.ac.jp
authors.forename: Akira
authors.initials: A
authors.lastname: Ikuta
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Tomiyasu
authors.forename: Yasumasa
authors.initials: Y
authors.lastname: Morita
authors.forename: Kouichi
authors.initials: K
authors.lastname: Yoshimura
mesh_terms: D007564:Japan; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D010840:Phytosterols / Q000737:chemistry / Q000302:isolation & purification*; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013237:Stereoisomerism; D028242:Theaceae / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000145:classification / Q000302:isolation & purification
chemical_list: D010840:Phytosterols; D014315:Triterpenes; C413246:oleanane; D009828:Oleanolic Acid