《Methyl salicylate glycosides in some Italian varietal wines》 was written by Carlin, Silvia; Masuero, Domenico; Guella, Graziano; Vrhovsek, Urska; Mattivi, Fulvio. Quality Control of Methyl SalicylateThis research focused onwine methyl salicylate glycoside Italy; Verdicchio wine; gaultherin; glycosides; methyl salicylate; methyl salicylate canthoside A; methyl salicylate gentiobioside; methyl salicylate glucoside; methyl salicylate rutinoside; methyl salicylate sambubioside; violutoside. The article conveys some information:
Glycosides are ubiquitous plant secondary metabolites consisting of a non-sugar component called an aglycon, attached to one or more sugars. One of the most interesting aglycons in grapes and wine is Me salicylate (MeSA), an organic ester naturally produced by many plants, particularly wintergreens. To date, nine different MeSA glycosides from plants have been reported, mainly spread over the genera Gaultheria, Camellia, Polygala, Filipendula, and Passiflora. From a sensorial point of view, MeSA has a balsamic-sweet odor, known as Wintergreen. MeSA was found in Vitis riparia grapes, in Vitis vinifera sp. and in the Frontenac interspecific hybrid. We found that the MeSA glycosides content in Verdicchio wines and in some genetically related varieties (Trebbiano di Soave and Trebbiano di Lugana) was very high. In order to understand which glycosides were present in wine, the methanolic extract of Verdicchio wine was injected into a UPLC-Q-TOF-HDMS and compared to the extracts of different plants rich in such glycosides. Using pure standards, we confirmed the existence of two glycosides in wine: MeSA 2-O-β-D-glucoside and MeSA 2-O-β-D-xylopyranosyl (1-6) β-D-glucopyranoside (gaultherin). For the first time, we also tentatively identified other diglycosides in wine: MeSA 2-O-α-L-arabinopyranosyl (1-6)-β-D-glucopyranoside (violutoside) and MeSA 2-O-β-D-apiofuranosyl (1-6)-β-D-glucopyranoside (canthoside A), MeSA 2-O-β-D-glucopyranosyl (1-6)-O-β-D-glucopyranoside (gentiobioside) and MeSA 2-O-α-L-rhamnopyranosyl (1-6)-β-D-glucopyranoside (rutinoside). Some of these glycosides have been isolated from Gaultheria procumbens leaves by preparative liquid chromatog. and structurally annotated by 1H- and 13C-NMR anal. Two of the peaks isolated from Gaultheria procumbens leaves, namely MeSA sambubioside and MeSA sophoroside, were herein observed for the first time. Six MeSA glycosides were quantified in 64 Italian white wines, highlighting the peculiar content and pattern in Verdicchio wines and related cultivars. The total concentration in bound and free MeSA in Verdicchio wines varied in the range of 456-9796μg/L and 5.5-143μg/L, resp., while in the other wines the bound and free MeSA was below 363μg/L and 12μg/L, resp. As this compound’s olfactory threshold is between 50 and 100μg/L, our data support the hypothesis that Me salicylate can contribute to the balsamic scent, especially in old Verdicchio wines. The experimental part of the paper was very detailed, including the reaction process of Methyl Salicylate(cas: 119-36-8Quality Control of Methyl Salicylate)
Methyl Salicylate(cas: 119-36-8) is a natural herbivore-induced plant volatile. It is a naturally occurring product in trees, legumes, exotic plants, vegetables, berries, and the primary constituent of the oil of wintergreen.Methyl Salicylate is produced from salicylic acid.Quality Control of Methyl Salicylate
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