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.
Diterpenes, ionol-derived and flavone glycosides from Podocarpus elongatus
BRACA, ALESSANDRA
2012-01-01
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.