Eight compounds, nagilactone C 7-O-α-L-arabinopyranosyl-(1→4)-β-D-xylopyranoside, nagilactone C 7-O-β-D-glucopyranosyl-(1→4)-β-D-xylopyranoside, nagilactone C 7-O-β-D-xylopyranoside, nagilactone A 7-O-α-L-arabinopyranosyl-(1→4)-β-D-xylopyranoside, 2β,15S,16,17,19-pentahydroxy-isopimar-8(14)-ene 17-O-β-D-glucopyranoside, 2β,15R,16,17,19-pentahydroxy-isopimar-8(14)-ene 17-O-β-D-glucopyranoside, 1-(2,6,6-trimethyl-4-hydroxycyclohexenyl)-1-hydroxy-buta-1-en-3-one 4-O-β-D-glucopyranoside, and vitexin 2''-O-β-D-(6'''-acetyl)-glucopyranoside together with thirteen known compounds, were isolated from the leaves of Podocarpus elongatus. Structures were elucidated by 1D and 2D NMR spectroscopy as well as by ESI mass spectrometry and chemical methods. The absolute configuration of the 15,16-diol moiety in compounds 5 and 6 was determined using Snatzke’s method.
|Autori interni:||BRACA, ALESSANDRA|
|Autori:||L. Faiella; A. Temraz; N. De Tommasi; A. Braca|
|Titolo:||Diterpenes, ionol-derived and flavone glycosides from Podocarpus elongatus|
|Anno del prodotto:||2012|
|Digital Object Identifier (DOI):||10.1016/j.phytochem.2011.11.007|
|Appare nelle tipologie:||1.1 Articolo in rivista|