Skip to main content
. 2020 Nov 30;25(23):5636. doi: 10.3390/molecules25235636

Figure 1.

Figure 1

(A) Representative proton nuclear magnetic resonance (1H-NMR) spectra (500 MHz, methanol-d4) of different solvent extracts of oil palm leaflet (OPL). (B) Part of 1H-NMR spectra of ethyl acetate extract within range of 4.2 to 5.4 ppm. (C) Part of 1H-NMR spectra of aqueous methanolic extract within range of 6.5 to 8.1 ppm. Identified metabolites: 1, sucrose; 2, fructose; 3, α-glucose; 4, β-glucose; 5, choline; 6, citric acid; 7, fumaric acid; 8, palmitic acid; 9, succinic acid; 10, aconitic acid; 11, fatty acid; 12, α-linolenic acid; 13, acetic acid; 14, (−)-epicatechin; 15, (+)-catechin; 16, orientin; 17, isoorientin; 18, vitexin; 19, isovitexin.