TITLE: Isolation and identification of minor secoiridoids and phenolic components
نویسندگان
چکیده
19 The application of a novel industrial process based on the hydrothermal treatment 20 of 160 oC/60 min of alperujo, a by-product of olive oil extraction, allows the formation 21 of a liquid phase containing a high concentration of phenolic and secoiridoid 22 compounds. Ethyl acetate was used to extract these phenolic compounds from the 23 aqueous matrix. The phenols present in high concentrations in the ethyl acetate extract 24 have been studied in previous work. In this study, we confirmed the presence of several 25 phenolic compounds existing in minor concentrations in the steam-treated alperujo 26 extract, but which contribute to the characteristics of this organic extract. The polar 27 compounds that remain in the aqueous fraction after extraction with ethyl acetate were 28 also studied. We report the presence of known compounds and we also detected an 29 unknown molecule with a molecular weight of 408 whose structure was characterized. 30 This new secoiridoid glucoside was identified as β-D-glucopyranosyl 31 acyclodihydroelenolic acid. 32
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Fate and Prediction of Phenolic Secoiridoid Compounds throughout the Different Stages of the Virgin Olive Oil Making Process
The evolution of the main phenolic secoiridoid compounds throughout the different stages of the virgin olive oil making process-crushing, malaxation and liquid-solid separation-is studied here, with the goal of making possible the prediction of the partition and transformation that take place in the different steps of the process. The concentration of hydroxytyrosol secoiridoids produced under ...
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