title: New marine sesquiterpenoids and diterpenoids from the Okinawan soft coral Clavularia koellikeri.
abstract: Six new terpenoids (two maaliane-type sesquiterpenoids, 1 and 2, one aromadendrane-type sesquiterpenoid, 3, one noraromadendrane-type sesquiterpenoid, 4, and two neodolabellane-type diterpenoids, 5 and 6) were isolated from the Okinawan soft coral Clavularia koellikeri. The structures of these compounds were determined on the basis of the results of spectroscopic analysis, chemical conversion, and X-ray crystallographic analysis. Compound 6 exhibited modest growth-inhibition effect in vitro toward tumor cells.
authors.affiliation: Laboratory of Bioorganic Chemistry, School of Life Science, Tokyo University of Pharmacy and Life Science, Horinouchi, Hachioji, Tokyo 192-0392, Japan. onocerin@ls.toyaku.ac.jp
authors.forename: Kazuo
authors.initials: K
authors.lastname: Iguchi
authors.forename: Takashi
authors.initials: T
authors.lastname: Fukaya
authors.forename: Akiko
authors.initials: A
authors.lastname: Yasumoto
authors.forename: Kinzo
authors.initials: K
authors.lastname: Watanabe
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D000970:Antineoplastic Agents; D018360:Crystallography, X-Ray; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D004951:Esterification; D006801:Humans; D007564:Japan; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009792:Oceans and Seas; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D004224:Diterpenes; D012717:Sesquiterpenes