Tannins and related polyphenols of melastomataceous plants. VIII. Nobotanins L, M and N, trimeric hydrolyzable tannins from Tibouchina semidecandra.
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.
Yoshida
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T
Faculty of Pharmaceutical Sciences, Okayama University, Tsushima, Japan.
Nakata
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F
Okuda
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T
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
D047348:Hydrolyzable Tannins; D010936:Plant Extracts; D013634:Tannins; C121312:nobotanin M; C121313:nobotanin N; C063355:nobotanin I