Abstract

The novel sesquiterpene lactone glucoside 2α-O-β- d- glucopyranosyl-4α- hydroxy-1α,5α,11α- H-guai-10(14)-en-12,8α- olide (=2α- hydroxy-11α,13- dihydro-1-epi-inuviscolide-2α-O-β- d- glucopyranoside) was isolated from flowerheads of Arnica mollis. Its structural elucidation was carried out by NMR spectroscopy ( 1H and 13C NMR, 1H 1H COSY, HMBC, HMQC and 1H 1H NOESY) and mass spectrometry (DCI). Additionally, the lignan (+)-pinoresinol-4′-β- d-glucopyranoside and benzyl-β-glucoside were isolated and identified.

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