title: Sesquiterpenes and acetogenins from the marine red alga Laurencia okamurai.
abstract: Three new halogenated sesquiterpenes, 10-bromo-7α,8α-expoxychamigr-1-en-3-ol (1), 10-bromo-β-chamigren-8-ol (2), and 10-bromo-3-chlorocupar-5-en-2-ol (3), one new C₁₂-acetogenin, desepilaurallene (7), one new naturally occurring sesquiterpene, 7-hydroxylaurene acetate (4), two known sesquiterpenes, allolaurinterol acetate (5) and laurene (6), and one known C₁₅-acetogenin, epilaurallene (8), were isolated from the marine red alga Laurencia okamurai collected from the coast of Rongcheng, China. The structures of these compounds were unambiguously established by 1D, 2D NMR and mass spectroscopic techniques. The bioassay results showed that 4, 5 exhibited potent antibacterial activity, and 1, 4, 5 were toxic to brine shrimp.
authors.affiliation: Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Li
authors.forename: Feng-Ping
authors.initials: FP
authors.lastname: Miao
authors.forename: Ke
authors.initials: K
authors.lastname: Li
authors.forename: Nai-Yun
authors.initials: NY
authors.lastname: Ji
mesh_terms: D054378:Acetogenins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000818:Animals; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001156:Artemia / Q000187:drug effects; D001688:Biological Products / Q000737:chemistry* / Q000494:pharmacology; D002681:China; D044722:Laurencia / Q000737:chemistry*; D015394:Molecular Structure; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: C574432:7-hydroxylaurene acetate; D054378:Acetogenins; D000900:Anti-Bacterial Agents; D001688:Biological Products; D012717:Sesquiterpenes; C574433:desepilaurallene; C532810:laurinterol