title: [Bromophenols from the brown alga Leathesia nana].
abstract: OBJECTIVE
  To investigate the chemical constituents of the brown alga Leathesia nana.
  
  
  METHODS
  Compounds were isolated by normal phase silica gel, Sephadex LH-20 chromatography and reverse phase HPLC techniques. Their structures were elucidated with spectroscopic methods including IR, MS and NMR.
  
  
  RESULTS
  Six compounds were isolated from ethanolic extract of the brown alga L. nana and their structures were identified as 2,2',3,3'-tetrabromo-4,4',5,5'-tetrahydroxydiphenyl methane, 2,2',3-tribromo-3', 4,4', 5-tetrahydroxy-6'-ethyloxymethyldiphenyl methane, 2,3-dibromo-4,5-dihydroxybenzyl alcohol, 2,3-dibromo-4,5-dihydroxybenzyl methyl ether, 3-bromo-4-hydroxybenzoic acid and 2-bromo-4,5-dihydroxybenzaldehyde.
  
  
  CONCLUSIONS
  All these compounds were obtained from this species for the first time.
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
authors.forename: Xiu-Li
authors.initials: XL
authors.lastname: Xu
authors.forename: Xiao
authors.initials: X
authors.lastname: Fan
authors.forename: Fu-Hang
authors.initials: FH
authors.lastname: Song
authors.forename: Jian-Gong
authors.initials: JG
authors.lastname: Shi
mesh_terms: D001559:Benzhydryl Compounds / Q000737:chemistry / Q000302:isolation & purification*; D000431:Ethanol; D000459:Phaeophyceae / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C502377:2,2',3,3'-tetrabromo-4,4',5,5'-tetrahydroxydiphenyl methane; C502378:2,2',3-tribromo-3',4,4',5-tetrahydroxy-6'-ethyloxymethyldiphenyl methane; D001559:Benzhydryl Compounds; D010636:Phenols; D000431:Ethanol