title: Diterpenes from the Brown Alga Dictyota crenulata.
abstract: The crude extract of the Brazilian brown alga Dictyota crenulata was analyzed by NMR spectroscopy and HRGC-MS techniques. Seven diterpenes were identified: pachydictyol A, dictyodial, 4beta-hydroxydictyodial A, 4beta-acetoxydictyodial A, isopachydictyol A, dictyol C and dictyotadiol. Xeniane diterpenes have previously been found in D. crenulata from the Pacific Ocean. The results characterize D. crenulata as a species that provides prenylated guaiane (group I) and xeniane diterpenes (group III), thus making it a new source of potential antiviral products.
authors.affiliation: Departamento de Biologia Vegetal, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, 20550-013, Brazil. jc.paula@terra.com.br
authors.forename: Joel Campos
authors.initials: JC
authors.lastname: De-Paula
authors.forename: Ludmila Bomeny
authors.initials: LB
authors.lastname: Bueno
authors.forename: Diana Negrão
authors.initials: DN
authors.lastname: Cavalcanti
authors.forename: Yocie
authors.initials: Y
authors.lastname: Yoneshigue-Valentin
authors.forename: Valéria Laneuville
authors.initials: VL
authors.lastname: Teixeira
mesh_terms: D000998:Antiviral Agents / Q000302:isolation & purification; D004224:Diterpenes / Q000032:analysis / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D000459:Phaeophyceae / Q000737:chemistry*; D045789:Sesquiterpenes, Guaiane
chemical_list: D000998:Antiviral Agents; D004224:Diterpenes; D045789:Sesquiterpenes, Guaiane; C421026:guaiane