The chemical composition of the oil extracted from the seeds of Nephelium lappaceum L., commonly known as rambutan, has been investigated. The oil from this plant, similar to other members of the Sapindaceae, typically contained triglycerides (83%) and cyanolipids (17%). The latter consisted of type III cyanolipids, 1-cyano-2-hydroxymethylprop-1-en-3-ol diesters. Structural investigation of the oil components was carried out using chemical, chromatographic and spectroscopic methods. Oleic and arachidic acids were the two dominant esterified fatty acyl chains in both triglycerides and cyanolipids. Eicosenoic acids (cis-vaccenic and paullinic acid) were present in higher amounts in the cyanolipid fraction of the oil.
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