title: Nakijiquinones E and F, new dimeric sesquiterpenoid quinones from marine sponge.
abstract: Two new dimeric sesquiterpenoid quinones, nakijiquinones E (1) and F (2), have been isolated from an Okinawan marine sponge, and the structures and relative stereochemistry of 1 and 2 were elucidated on the basis of the spectral data. Nakijiquinones E (1) and F (2) were the first dimeric sesquiterpenoid quinones possessing a 3-aminobenzoate moiety.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan.
authors.forename: Yohei
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Takaaki
authors.initials: T
authors.lastname: Kubota
authors.forename: Jun'ichi
authors.initials: J
authors.lastname: Kobayashi
mesh_terms: D000818:Animals; D016227:Benzoquinones / Q000737:chemistry / Q000302:isolation & purification*; D004159:Diphenylamine / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D008958:Models, Molecular; D015394:Molecular Structure; D011161:Porifera / Q000737:chemistry*; D011809:Quinones; D012717:Sesquiterpenes; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013237:Stereoisomerism
chemical_list: D016227:Benzoquinones; D011809:Quinones; D012717:Sesquiterpenes; C541043:nakijiquinone E; C541044:nakijiquinone F; D004159:Diphenylamine