Fig. 2: Triglyceride structure and 1H NMR spectrum of various edible oils (perilla oil, perilla flavored oil, corn oil, and soybean oil).

a Triglyceride structure composed of palmitic acid, linoleic acid, and α-linolenic acid and symbol display of fatty acid functional group for each signal of 1H NMR spectrum. 1H NMR spectra of b perilla oil, c perilla flavored oil, d corn oil, and e soybean oil.