until a syrup consistency was
reached. The lipidic residue was re-dissolved in 10 mL methanol–
water (80:20, v/v) and the extraction was repeated twice.
Hydroalcoholic extracts were re-dissolved in acetonitrile
(15 mL) and the mixture was washed three times with n-hexane
(15 mL each). Purified phenols in acetonitrile were concentrated
in vacuo at 30 C