title: Studies on polyethers produced by red algae.
abstract: Two novel squalene-derived triterpenes, spirodehydrovenustatriol (3) and 14-keto-dehydrothyrsiferol (4) were isolated from the red alga Laurencia viridis, together with two new and unusual C(17) terpenoids, adejen A (5) and B (6). These truncated structures possess structural similarities with other known squalene metabolites and their biogenetic origin has been proposed on the basis of an oxidative process of the squalene skeleton. All the structures were elucidated by extensive use of 2D NMR spectroscopic methods.
authors.affiliation: Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Cen-Pacheco
authors.forename: Laurette
authors.initials: L
authors.lastname: Nordström
authors.forename: María Luisa
authors.initials: ML
authors.lastname: Souto
authors.forename: Manuel Norte
authors.initials: MN
authors.lastname: Martín
authors.forename: José Javier
authors.initials: JJ
authors.lastname: Fernández
authors.forename: Antonio Hernández
authors.initials: AH
authors.lastname: Daranas
mesh_terms: D044722:Laurencia / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010084:Oxidation-Reduction; D013030:Spain; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C551505:14-keto-dehydrothyrsiferol; D013729:Terpenes; D014315:Triterpenes; C551504:spirodehydrovenustatriol