title: New beyerane and isopimarane diterpenoids from Rhizophora mucronata.
abstract: Chemical examination of the ethyl acetate extract of the roots of Rhizophora mucronata collected from Mangalore Coast resulted in the isolation of three more new diterpenoids, rhizophorins C-E (1-3) in addition to the two, rhizophorin A, (6R,11S,13S)-6,11,13-trihydroxy-2,3-seco-14-labden-2,8-olid-3-oic acid, and rhizophorin B, ent-3beta,20-epoxy-3alpha,18-dihydroxy-15-beyerene, recently reported. The structures of the new diterpenoids have been elucidated by a study of their physical and spectral data as 17-hydroxybeyer-15-en-3-one (1), 3beta,17-diacetoxy-15-beyeren-2-one (2) and 3beta,6alpha-diacetoxy-8(14),15-isopimaradien-2-one (3).
authors: School of Chemistry, Andhra University, Visakhapatnam, India. anjaneyuluasr@yahoo.com
authors: Ammanamanchi S R
authors: AS
authors: Anjaneyulu
authors: Vallurupalli
authors: V
authors: Anjaneyulu
authors: Vadali Lakshmana
authors: VL
authors: Rao
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry / Q000302:isolation & purification*; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D019684:Magnoliopsida / Q000737:chemistry; D010616:Phenanthrenes / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry
chemical_list: D002264:Carboxylic Acids; D004224:Diterpenes; D010616:Phenanthrenes; C458719:beyerenoic acid; C467529:rhizophorin C; C467527:rhizophorin D; C467528:rhizophorin E; C115138:isopimaric acid