title: Tannins and related polyphenols of melastomataceous plants. VIII. Nobotanins L, M and N, trimeric hydrolyzable tannins from Tibouchina semidecandra.
abstract: Three hydrolyzable tannins, nobotannins L, M and N, were isolated from the water-soluble portion of the leaf extract of Tibouchina semidecandra, and their trimeric structures were elucidated from spectral and chemical evidence. Nobotanins L and N exist as equilibrium mixtures of four anomers due to the presence of two unacylated anomeric centers.
authors.affiliation: Faculty of Pharmaceutical Sciences, Okayama University, Tsushima, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yoshida
authors.forename: F
authors.initials: F
authors.lastname: Nakata
authors.forename: T
authors.initials: T
authors.lastname: Okuda
mesh_terms: D002240:Carbohydrate Sequence; D006868:Hydrolysis; D047348:Hydrolyzable Tannins; D007536:Isomerism; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D010944:Plants / Q000737:chemistry*; D013634:Tannins / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D047348:Hydrolyzable Tannins; D010936:Plant Extracts; D013634:Tannins; C121312:nobotanin M; C121313:nobotanin N; C063355:nobotanin I