title: Lycopanerols I-L, four new tetraterpenoid ethers from Botryococcus braunii.
abstract: Four new tetraterpenoid ethers, lycopanerols I-L (5-8), were isolated from a culture of a strain of the green microalga Botryococcus braunii (L race). The structures were determined by means of spectral analyses and chemical degradation. The relative stereochemistry of these ethers was established by ROESY NMR. A biogenetic relationship is proposed between lycopanerols and lycopadiene (1), the acyclic diunsaturated tetraterpene hydrocarbon synthesized by the alga.
authors.affiliation: Laboratoire de Chimie Bioorganique et Organique Physique, Service RMN, and Laboratoire de Spectrométrie de Masse, Ecole Nationale Supérieure de Chimie de Paris, 11 Rue Pierre et Marie Curie, 75231 Paris Cedex 05, France. pierre-metzger@enscp.jussieu.fr
authors.forename: Pierre
authors.initials: P
authors.lastname: Metzger
authors.forename: Marie-Noëlle
authors.initials: MN
authors.lastname: Rager
authors.forename: Nicole
authors.initials: N
authors.lastname: Sellier
authors.forename: Claude
authors.initials: C
authors.lastname: Largeau
mesh_terms: D000460:Chlorophyta / Q000737:chemistry* / Q000378:metabolism; D007560:Cote d'Ivoire; D004987:Ethers / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004987:Ethers; D013729:Terpenes