title: Isomalabaricane-type nortriterpenoids and other constituents of the marine sponge Geodia japonica.
abstract: Twelve compounds were isolated from the sponge Geodia japonica collected from the South China Sea, including two new isomalabaricane-type nortriterpenoids, geoditins A (1) and B (2), and a new sterol derivative (4). All chemical structures were established by interpretation of the spectroscopic data.
authors.affiliation: Department of Chemistry, Hong Kong University of Science & Technology, Hong Kong.
authors.forename: W H
authors.initials: WH
authors.lastname: Zhang
authors.forename: C T
authors.initials: CT
authors.lastname: Che
mesh_terms: D000818:Animals; D002681:China; D004151:Dipeptides / Q000737:chemistry / Q000302:isolation & purification; D004875:Ergosterol / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification*; D013058:Mass Spectrometry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010456:Peptides, Cyclic / Q000737:chemistry / Q000302:isolation & purification; D011161:Porifera / Q000737:chemistry*; D012118:Resorcinols / Q000737:chemistry / Q000302:isolation & purification*; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C445695:26-methylergosta-5,24-dien-7-one-3-ol; D004151:Dipeptides; D010456:Peptides, Cyclic; D012118:Resorcinols; D014315:Triterpenes; C445694:cyclo(leucyl-prolyl); C445692:geoditin A; C445693:geoditin B; D004875:Ergosterol