title: Nobiloside, a new neuraminidase inhibitory triterpenoidal saponin from the marine sponge Erylus nobilis.
abstract: A neuraminidase inhibitor, nobiloside (1), was isolated from the marine sponge Erylus nobilis Thiele, 1903. Its structure was determined as a penasterol trisaccharide. The absolute configurations were determined by NMR and chiral GC analysis. It inhibited neuraminidase from the bacterium Clostridium perfringens with an IC50 value of 0.46 microg/mL.
authors.affiliation: Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Takada
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Nakao
authors.forename: Shigeki
authors.initials: S
authors.lastname: Matsunaga
authors.forename: Rob W M
authors.initials: RW
authors.lastname: van Soest
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Fusetani
mesh_terms: D000818:Animals; D002849:Chromatography, Gas; D002851:Chromatography, High Pressure Liquid; D003013:Clostridium / Q000201:enzymology; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007564:Japan; D008968:Molecular Conformation; D015394:Molecular Structure; D009439:Neuraminidase / Q000037:antagonists & inhibitors; D019906:Nuclear Magnetic Resonance, Biomolecular; D011161:Porifera / Q000737:chemistry*; D013237:Stereoisomerism; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D014312:Trisaccharides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D004791:Enzyme Inhibitors; D013261:Sterols; D014312:Trisaccharides; C456053:nobiloside; D009439:Neuraminidase