title: A new isopimarane-type diterpene and a new natural atisane-type diterpene from Excoecaria agallocha.
abstract: From the woods of Excoecaria agallocha, a new isopimarane-type diterpene, 3alpha,11beta-dihydroxy-ent-isopimara-8(14),15-dien-2-one and a new natural atisane-type diterpene, 16beta-hydroxy-ent-atisan-3-one were isolated together with three known compounds, ribenone, ent-labda-8(17),13E-diene-3beta,15-diol, and ent-3beta-hydroxybeyer-15-ene-2,12-dione. Their structures were determined by spectral data and x-ray crystallography evidence.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Kang
authors.forename: Ruo-Yun
authors.initials: RY
authors.lastname: Chen
authors.forename: De-Quan
authors.initials: DQ
authors.lastname: Yu
mesh_terms: D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D019665:Euphorbiaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D014961:X-Ray Diffraction
chemical_list: C507484:16beta-hydroxy-ent-atisan-3-one; C507483:3alpha,11beta-dihydroxy-ent-isopimara-8(14),15-dien-2-one; D004224:Diterpenes