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Titolo:
Antisweet saponins from Gymnema sylvestre
Autore:
Ye, WC; Liu, X; Zhang, QW; Che, CT; Zhao, SX;
Indirizzi:
Hong Kong Univ Sci & Technol, Dept Chem, Clear Water Bay, Hong Kong, Peoples R China Hong Kong Univ Sci & Technol Clear Water Bay Hong Kong Peoples R China a China Pharmaceut Univ, Dept Phytochem, Nanjing, Peoples R China China Pharmaceut Univ Nanjing Peoples R China Nanjing, Peoples R China Chinese Univ Hong Kong, Sch Chinese Med, Shatin, Hong Kong, Peoples R China Chinese Univ Hong Kong Shatin Hong Kong Peoples R China Peoples R China
Titolo Testata:
JOURNAL OF NATURAL PRODUCTS
fascicolo: 2, volume: 64, anno: 2001,
pagine: 232 - 235
SICI:
0163-3864(200102)64:2<232:ASFGS>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
NATURAL-PRODUCTS; LEAVES; VI; BR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Che, CT Hong Kong Univ Sci & Technol, Dept Chem, Clear Water Bay, Hong Kong, Peoples R China Hong Kong Univ Sci & Technol Clear Water Bay Hong Kong Peoples R China
Citazione:
W.C. Ye et al., "Antisweet saponins from Gymnema sylvestre", J NAT PROD, 64(2), 2001, pp. 232-235

Abstract

Three new oleanane-type triterpene glycosides (1-3), along with the sodiumsalt of alternoside II (4), were isolated from an ethanol extract of the leaves of Gymnema sylvestre. The structures of these new saponins were identified as 21 beta -O-benzoylsitakisogenin 3-O-beta -D-glucopyranosyl(1-->3)-beta -D-glucuronopyranoside (1), the potassium salt of longispinogenin 3-O-beta -D-glucopyranosyl(1-->3)-beta -D-glucuronopyranoside (2), and the potassium salt of 29-hydroxylongispinogenin 3-O-beta -D-glucopyranosyl( 1-->3)-beta -D-glucuronopyranoside (3). The aglycon of 3, gymnemagenol (3a), was characterized as 3 beta ,16 beta ,28,29-tetrahydroxyolean-12-ene. Structure elucidation was accomplished by interpretation of NMR (DQF-COSY, HMQC, and HMBC) results, FARMS, and hydrolysis. Saponin 1 and the sodium salt of alternoside II (4) exhibited antisweet activity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 10:01:22