A novel phenylethanoid dimer and flavonoids from Jacaranda mimosaefolia

Abstract

A novel phenylethanoid dimer, namely, jacraninoside A (1) and the five known constituents EfZacetoside (2), isoacetoside (3), cistanoside E (4), 6'-acetylacetoside (5), and campneoside I (6) together with the seven flavonoids isoquercitrin (7), scutellarein 7-O-β-D-glucuronopyranoside methyl ester (8), apigenin 7-O-β-D-galacturonopyranoside (9), luteolin 7-O-β-D-glucuronopyranoside methyl ester (10), apigenin 7-O-β-D-glucuronopyranoside methyl ester (11), luteolin 7-0-/3-Dglucopyranoside (12), and isovitexin (13) were isolated from the aqueous methanol extract of Jacaranda mimosaefolia D. Don. leaves. All known metabolites have been identified in this genus for the first time except for 2 and 12 which had been isolated once before from the leaves and twigs of Jacaranda mimosaefolia. Their structures were elucidated based on chemical evidences and spectroscopic analyses (ID and 2D NMR, HRMS ( - )-ESI)/MS, UV). © 2007 Verlag der Zeitschrift für Naturforschung.