title: A new C-20 polyacetylene from the sponge Callyspongia pseudoreticulata.
abstract: The Indonesian marine sponge Callyspongia pseudoreticulata was found to contain (3S,18S,4E,16E)-eicosa-1,19-diyne-3,18-diol-4,16-diene (1), the structure of which was determined by detailed spectroscopic analysis. Its absolute configuration was established using the modified Mosher's method after esterification of the secondary alcohols with Mosher's reagent.
authors.affiliation: Department of Organic Chemistry, Faculty of Sciences, CP 160/06, University of Brussels, 50 Avenue F.D. Roosevelt, B-1050 Brussels, Belgium. braekman@ulb.bc.ae
authors.forename: J C
authors.initials: JC
authors.lastname: Braekman
authors.forename: D
authors.initials: D
authors.lastname: Daloze
authors.forename: C
authors.initials: C
authors.lastname: Devijver
authors.forename: D
authors.initials: D
authors.lastname: Dubut
authors.forename: R W M
authors.initials: RW
authors.lastname: van Soest
mesh_terms: D000114:Acetylene / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification*; D000480:Alkynes; D000818:Animals; D053280:Diynes; D004951:Esterification; D007202:Indicators and Reagents; D007214:Indonesia; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D011108:Polymers / Q000737:chemistry / Q000302:isolation & purification*; D011161:Porifera / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: C478837:(3S,18S,4E,16E)-eicosa-1,19-diyne-3,18-diol-4,16-diene; D000480:Alkynes; D053280:Diynes; D007202:Indicators and Reagents; D011108:Polymers; D000114:Acetylene