title: [Novel triterpene glycosides from the sponge Ulosa sp].
abstract: New triterpene glycosides, ulososides C, (20S,22S,23R,24S)-3 beta,22, 23-trihydroxy-3-O-(beta-D-glucopyranosyl)-32-nor-24-methyllanost- 8(9)-ene-30-oic acid, D, (20S,22S,23R,24S)-3 beta,22, 23-trihydroxy-3-O-(beta-D-N-acetyl-glucosaminopyranosyl)-32-nor- 24-methyllanost-8(9)-ene-30-oic acid, and E, (20S,22S,23R,24S)-3 beta,22, 23-trihydroxy-3-O-(beta-D-glucuronopyranosyl-(1-->2)-alpha-D- arabinopyranosyl-32-nor-24-methyllanost-8(9)-ene-30-oic acid, were isolated from an Ulosa sp. sponge. Their structures were determined by spectral methods and chemical transformations. Specific features of their structures are discussed.
authors.affiliation: Pacific Institute of Bioorganic Chemistry, Far Eastern Division, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok, 690022 Russia.
authors.forename: A S
authors.initials: AS
authors.lastname: Antonov
authors.forename: A I
authors.initials: AI
authors.lastname: Kalinovskiĭ
authors.forename: P S
authors.initials: PS
authors.lastname: Dmitrenok
authors.forename: V A
authors.initials: VA
authors.lastname: Stonik
mesh_terms: D000818:Animals; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D009005:Monosaccharides / Q000032:analysis; D011161:Porifera / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D006027:Glycosides; D009005:Monosaccharides; D014315:Triterpenes