Flavonoids from Aconitum napellus subsp neomontanum

Three flavonol glycosides quercetin 7-O-(6-trans-caffeoyl)-beta -glucopyranosyl-(1 -->3)-alpha -rhamnopyranoside-3-O-beta -glucopyranoside (1), kaempferol 7-O-(6-trans-caffeoyl)-beta -glucopyranosyl-(1 -->3)-alpha -rhamnopyranoside-3-O-beta -glucopyranoside (2), and kaempferol 7-O-(6-trans-p-coumaroyl)-beta -glucopyranosyl-(1 -->3)-alpha -rhamnopyranoside-3-O-beta -glucopyranoside (3), together with the known beta -3,4-dihydroxyphenethyl beta -glucopyranoside, were isolated from the flowers of Aconitum napellus subsp. neomonthanum. Their structures were elucidated bq spectroscopic methods, including 2D NMR Spectral techniques. (C) 2001 Elsevier Science Ltd. All rights reserved.