A new vitamin E, d-tocomonoenol, has been isolated from Actinidia chinensis (kiwi) fruits. The new structure, 2,8-dimethyl-2-(4,8,12-trimethyltridec-11-enyl)chroman-6-ol, has been elucidated on the basis of EIMS, 1D, and 2D NMR spectral data. GC–MS analysis of peels and pulps of kiwi showed that the new compound, together with d-tocopherol, is mainly present in the fruit peel, whilst a-tocopherol is present in a similar amount in both matrices. The compound was tested for its radical-scavenging and antioxidant capabilities, by measuring its ability to scavenge DPPH (2,20-diphenyl-1-picrylhydrazyl radical) and anion superoxide radical, and inhibit the formation of methyl linoleate conjugated diene hydroperoxides and TBARS (thiobarbituric acid reactive species).
delta-Tocomonoenol: A new vitamin E from kiwi (Actinidia chinensis) fruits / Fiorentino, Antonio; D’Abrosca, B.; Pacifico, S.; Scognamiglio, M.; Cefarelli, G.; Caputo, Romualdo; Monaco, Pietro. - In: FOOD CHEMISTRY. - ISSN 0308-8146. - STAMPA. - 115:(2009), pp. 187-192. [doi:10.1016/j.foodchem.2008.11.094]
delta-Tocomonoenol: A new vitamin E from kiwi (Actinidia chinensis) fruits
FIORENTINO, ANTONIO;CAPUTO, ROMUALDO;MONACO, PIETRO
2009
Abstract
A new vitamin E, d-tocomonoenol, has been isolated from Actinidia chinensis (kiwi) fruits. The new structure, 2,8-dimethyl-2-(4,8,12-trimethyltridec-11-enyl)chroman-6-ol, has been elucidated on the basis of EIMS, 1D, and 2D NMR spectral data. GC–MS analysis of peels and pulps of kiwi showed that the new compound, together with d-tocopherol, is mainly present in the fruit peel, whilst a-tocopherol is present in a similar amount in both matrices. The compound was tested for its radical-scavenging and antioxidant capabilities, by measuring its ability to scavenge DPPH (2,20-diphenyl-1-picrylhydrazyl radical) and anion superoxide radical, and inhibit the formation of methyl linoleate conjugated diene hydroperoxides and TBARS (thiobarbituric acid reactive species).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
