ent-Labdane Glycosides from Heterothalamus alienus

Two new diterpene glycosides, 8-O- beta -D-xylopyranosyl-ent 8 beta -hydroxylabdan-15-oic acid [1] and 8-O- beta -D-glucopyranosyl-ent 8 beta -hydroxylabdan-15-oic acid [2], were isolated from Heterothalamus alienus. Their structures were elucidated by nmr spectroscopy, and their absolute configurat...

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Veröffentlicht in:	Journal of natural products (Washington, D.C.) D.C.), 1993-11, Vol.56 (11), p.1944-1947
Hauptverfasser:	Saad, José R, Giordano, Oscar S, Cerda-García-Rojas, Carlos M, Trujillo-Serrato, Joel J, Joseph-Nathan, Pedro
Format:	Artikel
Sprache:	eng
Schlagworte:	Biological and medical sciences Chemical constitution compositae diterpenoide diterpenoids diterpenos espectroscopia rmn extractos vegetales extrait d' origine vegetale Fundamental and applied biological sciences. Psychology glicosidos glycoside glycosides nmr spectroscopy plant extracts Plant physiology and development spectroscopie rmn
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Beschreibung
Zusammenfassung:	Two new diterpene glycosides, 8-O- beta -D-xylopyranosyl-ent 8 beta -hydroxylabdan-15-oic acid [1] and 8-O- beta -D-glucopyranosyl-ent 8 beta -hydroxylabdan-15-oic acid [2], were isolated from Heterothalamus alienus. Their structures were elucidated by nmr spectroscopy, and their absolute configurations were determined by transformation of both natural products into methyl ent-8 beta -hydroxylabdan-15-oate. The sugar residues were identified after acid hydrolyses of the two natural products.
ISSN:	0163-3864 1520-6025
DOI:	10.1021/np50101a012