Summary:
In the present study, different virgin olive oils were studied phytochemically
and 7 natural products were isolated. Virgin olive oils were treated with
adsorption resin XAD7HP, resulting in the production of a fraction, enriched
with polyphenols. The methanol fraction that resulted from the treatment with
resin XAD7HP of the olive oils was studied phytochemically, and 7 natural
products were isolated and identified, which can be categorized to 3 natural
products categories. Specifically, they belong to phenolic derivatives
(hydroxytyrosol), secoiridoids (oleocanthal, oleacin, aldehydic form of
ligstroside, aldehydic form of oleuropein), and lignans
((+)-acetoxypinoresinol). From the isolated products, methyl ester of elenolic
acid 1 is new natural product. Moreover, a procedure was developed for the
isolation of oleocanthal, oleacin and hydroxytyrosol in large quantities, using
only the technology of FCPC, and Quantitation of oleocanthal, oleacin, and the
aldehydic form of ligstroside, using fifteen Greek virgin olive oils from
different regions and producers, by NMR was pkerformed.
Keywords:
Extra virgin olive oil, Oleocanthal, Phenolic compounds of extra virginolive oil, Resin xad7HP, FCPC