title: Polyacetylenes from a red sea sponge Callyspongia species.
abstract: From the methanolic extract of the Red Sea sponge Callyspongia sp. six new polyacetylenic compounds, aikupikanynes A-F, together with octahydrosiphonochalyne, were isolated and identified. Their structures, which comprise four hydrocarbons, two alcohols, and one unprecedented alpha-hydroxy carboxylic acid, were determined by extensive 1D and 2D NMR studies and mass spectral determinations.
authors.affiliation: Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822-2275, USA.
authors.forename: D T
authors.initials: DT
authors.lastname: Youssef
authors.forename: W Y
authors.initials: WY
authors.lastname: Yoshida
authors.forename: M
authors.initials: M
authors.lastname: Kelly
authors.forename: P J
authors.initials: PJ
authors.lastname: Scheuer
mesh_terms: D000114:Acetylene / Q000031:analogs & derivatives* / Q000737:chemistry* / Q000302:isolation & purification; D000818:Animals; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011108:Polymers / Q000737:chemistry* / Q000302:isolation & purification; D053279:Polyynes; D011161:Porifera / Q000737:chemistry*
chemical_list: D011108:Polymers; D053279:Polyynes; D000114:Acetylene