title: Dimeric and trimeric hydrolyzable tannins from Quercus coccifera and Quercus suber.
abstract: Three new hydrolyzable tannins, cocciferins D(1) (1), D(2) (2), and T(1) (4), were isolated from the leaves of Quercus coccifera. Cocciferin D(2) (2) and two additional new tannins, cocciferins D(3) (3) and T(2) (5), were also obtained from the leaves of Quercus suber. Their oligomeric structures were elucidated on the basis of spectroscopic methods and chemical evidence. Compounds 2, 3, and 5 were rare oligomers possessing glucose cores with both open-chain and pyranose forms.
authors.affiliation: Faculty of Pharmaceutical Sciences, Okayama University, Tsushima, Okayama, 700-8530, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Ito
authors.forename: Koji
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Tae-Hoon
authors.initials: TH
authors.lastname: Kim
authors.forename: Seddik
authors.initials: S
authors.lastname: Khennouf
authors.forename: Kamel
authors.initials: K
authors.lastname: Gharzouli
authors.forename: Takashi
authors.initials: T
authors.lastname: Yoshida
mesh_terms: D000462:Algeria; D002851:Chromatography, High Pressure Liquid; D005947:Glucose / Q000737:chemistry; D006868:Hydrolysis; D047348:Hydrolyzable Tannins; D008745:Methylation; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D011714:Pyrans / Q000737:chemistry; D029963:Quercus / Q000737:chemistry*; D013634:Tannins / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D047348:Hydrolyzable Tannins; D011714:Pyrans; D013634:Tannins; C455779:cocciferin D1; C455780:cocciferin D2; C455781:cocciferin T1; D005947:Glucose