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. 2022 Jan 20;27(3):661. doi: 10.3390/molecules27030661

Figure 1.

Figure 1

Phenolic compounds mentioned in figures. C6-C1 group: 1 p-hydroxybenzoic acid; 2 3,4-dihydroxybenzoic acid; 3 gallic acid, 4 vanillic acids; 5 syringic acid; 6 o-vanillin. C6-C2 group: 7 tyrosol; 8 hydroxytyrosol; 9 p-hydroxyphenyl acetic acid. C6-C3 group: 10 o-coumaric acid; 11 p-coumaric acid; 12 caffeic acid; 13 ferulic acid. C6-C3-C6 group: 14 apigenin; 15 luteolin; 16 quercetin. Secoiridoids: 17 oleuropein, 18 3,4-DHPEA-EA; 19 pHPEA-EA; 20 3,4-DHPEA-EDA; 21 p-HPEA-EDA. Lignans: 22 pinoresinol; 23 verbascoside.