The fatty acid composition was determined by GC after derivatization to fatty acid methyl esters (FAME) with 2 N KOH in methanol, according to IUPAC Standard Methods 2.301 and 2.302. An Agilent 6890 GC system (Agilent Technologies, Santa Clata, CA) equipped with a split/splitless injector, an Innowax capillary column (30 m length, 0.25 mm i.d., 0.20 lm film thickness) and a flame ionization detector (FID) was used.