The analysis of the polar fraction of Galeopsis angustifolia Ehrh. ex Hoffm. indicates that the main components are iridoids and flavonoids. Six compounds were identified: a new flavonoid, 3-hydroxy-isoscutellarein 7-O-[6acetyl--D-glucopyranosyl-(12)--D-glucopyranoside]; three iridoid glucosides: harpagide, acetyl harpagide and for the first time in this species, 8-epi-loganin; two known acetylated flavonoid glycosides: 3-hydroxy-4-O-methylisoscutellarein 7-O-[6acetyl--D-allopyranosyl-(12)-6-acetyl--D-glucopyranoside], 3-hydroxy-4-O-methylisoscutellarein 7-O-[6acetyl--D-allopyranosyl-(12)--D-glucopyranoside]. Both flavonoids and iridoids are present in high amount; respectively, 16.7% and 4.5% of the crude extract.
A new flavonoid and other polar compounds from Galeopsis angustifolia Ehrh. ex Hoffm / Venditti, Alessandro; Serrilli, ANNA MARIA; Bianco, Armandodoriano. - In: NATURAL PRODUCT RESEARCH. - ISSN 1478-6419. - STAMPA. - 27:4-5(2013), pp. 412-416. [10.1080/14786419.2012.724066]
A new flavonoid and other polar compounds from Galeopsis angustifolia Ehrh. ex Hoffm.
VENDITTI, ALESSANDRO;SERRILLI, ANNA MARIA;BIANCO, Armandodoriano
2013
Abstract
The analysis of the polar fraction of Galeopsis angustifolia Ehrh. ex Hoffm. indicates that the main components are iridoids and flavonoids. Six compounds were identified: a new flavonoid, 3-hydroxy-isoscutellarein 7-O-[6acetyl--D-glucopyranosyl-(12)--D-glucopyranoside]; three iridoid glucosides: harpagide, acetyl harpagide and for the first time in this species, 8-epi-loganin; two known acetylated flavonoid glycosides: 3-hydroxy-4-O-methylisoscutellarein 7-O-[6acetyl--D-allopyranosyl-(12)-6-acetyl--D-glucopyranoside], 3-hydroxy-4-O-methylisoscutellarein 7-O-[6acetyl--D-allopyranosyl-(12)--D-glucopyranoside]. Both flavonoids and iridoids are present in high amount; respectively, 16.7% and 4.5% of the crude extract.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
