title: Triterpene glycosides from Antarctic sea cucumbers III. Structures of liouvillosides A(4) and A(5), two minor disulphated tetraosides containing 3-O-methylquinovose as terminal monosaccharide units from the sea cucumber Staurocucumis liouvillei (Vaney).
abstract: Two new minor triterpene glycosides, liouvillosides A(4) (1) and A(5) (2) have been isolated from the sea cucumber Staurocucumis liouvillei living in Antarctic and Sub-Antarctic waters. The structures of the new glycosides were elucidated using extensive nuclear magnetic resonance (NMR) spectroscopy ((1)H- and (13)C-NMR spectroscopy, (1)H-(1)H COSY, 1D-TOCSY, HMBC, HSQC and NOESY), ESI-MS and MALDI TOF MS. The glycosides 1 and 2 are disulphated tetraosides having very rare 3-O-methylquinovose as terminal monosaccharide.
authors.affiliation: Pacific Institute of Bioorganic Chemistry , Far East Division of the Russian Academy of Sciences , Pr. 100-letya Vladivostoka 159 , 690022 Vladivostok , Russia.
authors.forename: Alexandr S
authors.initials: AS
authors.lastname: Antonov
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Avilov
authors.forename: Anatoly I
authors.initials: AI
authors.lastname: Kalinovsky
authors.forename: Pavel S
authors.initials: PS
authors.lastname: Dmitrenok
authors.forename: Vladimir I
authors.initials: VI
authors.lastname: Kalinin
authors.forename: Sergi
authors.initials: S
authors.lastname: Taboada
authors.forename: Manuel
authors.initials: M
authors.lastname: Ballesteros
authors.forename: Conxita
authors.initials: C
authors.lastname: Avila
mesh_terms: D000818:Animals; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009844:Oligosaccharides / Q000737:chemistry; D012616:Sea Cucumbers / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry*
chemical_list: D006027:Glycosides; D009844:Oligosaccharides; D014315:Triterpenes; C433554:liouvilloside A