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Fitoterapia 2019-Aug

Non volatile constituents of the vermouth ingredient Artemisia vallesiaca.

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Federica Pollastro
Annalisa Lopatriello
José Vouillamoz
Giovanni Appendino
Orazio Taglialatela-Scafati
Martino Forino

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요약

The Alpine wormwood Artemisia vallesiaca All. was considered the most valuable ingredient of vermouth, a celebrated aromatized wine. A. vallesiaca has a very limited geographical distribution, and the booming market of vermouth decimated its natural population, resulting in the eventual replacement of this rare species with more common and less expensive wormwoods like A. absinthium L.. Over the past years, attempts to revive the original recipe(s) of vermouth have fostered the establishment of cultivations of A. vallesiaca in pre-montane settings. In order to assist these projects, the phytochemical profile of cultivated plants and of several native populations of A. vallesiaca from the Swiss Valais were comparatively evaluated, focusing on sesquiterpene lactones and on lipophilic flavonoids, the hallmark constituents of Artemisia species. Remarkably, no significant difference was detected between the samples, despite the different origins. The lipophilic flavonoids of A. vallesiaca were similar to those of related species used in the production of vermouth, but the presence of C-9 oxygenated 11β-methyl germacranolides and eudesmanolides (herbolides) made its sesquiterpene lactone profile peculiar. In addition to known compounds, two novel germacranolides were also characterized (herbolides J and K), and the major sesquiterpene lactone from the plant, the bitter germacranolide herbolide D (4), was detected and quantified by 1H NMR in a bitter liqueur aromatized with A. vallesiaca. Taken together, these observations qualify herbolides as marker to identify A. vallesiaca in aromatized alcohol matrixes.

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