Sacha Inchi (P. volubilis L.) oil was purchased from a local market
in Lima, Peru. Sodium methoxide (NaOCH3), methanol (CH3OH)
and n-hexane (C6H14) were purchased from Sigma–Aldrich
(St. Louis, MO, USA). CDCl3 (99%) was used as the solvent in NMR
analysis. Soybean oil and corn oil were purchased at the local
market (Volta Redonda, RJ, Brazil).