title: ent-Eudesmane sesquiterpenoids, galloyl esters of the oak lactone precursor, and a 3-O-methylellagic acid glycoside from the wood of Platycarya strobilacea.
abstract: ent-Eudesmane sesquiterpenoids, 8,11-dihydroxy-2,4-cycloeudesmane, 11-hydroxy-2,4-cycloeudesman-8-one and 2,4-cyclo-7(11)-eudesmen-8-one, were isolated from the wood of Platycarya strobilacea, which has been used as an aromatic tree since at least the 18th century. On charring the wood, 2,4-cyclo-7(11)-eudesmen-8-one was detected in the smoke. In the charred wood, the concentrations of ellagitannins, such as galloyl pedunculagin, dramatically decreased, whereas concentrations of pentagalloyl glucose, and other gallotannins were relatively stable. In addition, two other compounds, the 6'-O-m- and p-digalloyl oak lactone precursor and the 3-O-methylellagic acid 4'-O-(4″-O-galloyl)-xylopyranoside, were isolated from the charred wood along with m- and p-digallic acid.
authors: Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
authors: Hajime
authors: H
authors: Maeda
authors: Narumi
authors: N
authors: Kakoki
authors: Mami
authors: M
authors: Ayabe
authors: Yuki
authors: Y
authors: Koga
authors: Tomoko
authors: T
authors: Oribe
authors: Yosuke
authors: Y
authors: Matsuo
authors: Takashi
authors: T
authors: Tanaka
authors: Isao
authors: I
authors: Kouno
mesh_terms: D005707:Gallic Acid / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D007564:Japan; D029525:Juglandaceae / Q000737:chemistry*; D007783:Lactones / Q000737:chemistry*; D015394:Molecular Structure; D045787:Sesquiterpenes, Eudesmane / Q000737:chemistry / Q000302:isolation & purification*; D014934:Wood / Q000737:chemistry
chemical_list: C559666:11-hydroxy-2,4-cycloeudesman-8-one; C559667:2,4-cyclo-7(11)-eudesmen-8-one; C559668:8,11-dihydroxy-2,4-cycloeudesmane; D007783:Lactones; D045787:Sesquiterpenes, Eudesmane; D005707:Gallic Acid