title: Structure of eximisoside A, a novel triterpene glycoside from the Far-Eastern sea cucumber psolus eximius.
abstract: The new triterpene saponin eximisoside A (1) has been isolated from the Far-Eastern sea cucumber Psolus eximius and its structure elucidated by 1D and 2D NMR (13C, 1H, 1H-1H COSY, HMQC, and NOESY spectra), and FABMS studies. The structural features of eximisoside A (1) are the rare presence of a 23 double bond in the aglycon and the absence of quinovose, typically found in the oligosaccharide chain of holothurian glycosides.
authors.affiliation: Pacific Institute of Bioorganic Chemistry, Far East Division of Russian Academy of Sciences, Vladivostok, Russia. kav@piboc.marine.su
authors.forename: V I
authors.initials: VI
authors.lastname: Kalinin
authors.forename: S A
authors.initials: SA
authors.lastname: Avilov
authors.forename: E Y
authors.initials: EY
authors.lastname: Kalinina
authors.forename: O G
authors.initials: OG
authors.lastname: Korolkova
authors.forename: A I
authors.initials: AI
authors.lastname: Kalinovsky
authors.forename: V A
authors.initials: VA
authors.lastname: Stonik
authors.forename: R
authors.initials: R
authors.lastname: Riguera
authors.forename: C
authors.initials: C
authors.lastname: Jiménez
mesh_terms: D000818:Animals; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D012616:Sea Cucumbers / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014315:Triterpenes / Q000737:chemistry*
chemical_list: D006027:Glycosides; D014315:Triterpenes; C108203:eximisoside A