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. 2022 Sep 14;7(38):33873–33883. doi: 10.1021/acsomega.2c02746

Table 3. Phenolic Quantifications (mg/kg ± Standard Deviation) of Olive Root Bark and Wooda.

    concentration (mg/kg)
class phenolic compounds root bark root wood
simple phenols hydroxytyrosol 50.5 ± 0.4a 359.8 ± 1.0b
phenolic acids p-coumaric acid 0.07 ± 0.0a 0.05± 0.0a
secoiridoids and derivatives verbascoside 51 ± 0.8a 191 ± 1.0b
oleacein 185 ± 1.0a 890 ± 1.9b
aldehydic closed form of oleuropein aglycon 357 ± 1.0a 1209 ± 2.0b
oleuropein 3374 ± 2.5a 7360 ± 2.5b
oleocanthal 989 ± 1.0a 2115 ± 1.0b
aldehydic closed form of ligstroside aglycon 50± 0.3a 60 ± 0.9a
monoaldehydic open form of oleuropein aglycon 654 ± 1.0a 2287 ± 1.2b
monoaldehydic open form of ligstroside aglycon 94 ± 0.6a 4560 ± 1.5b
total   5754 ± 8.2a 18672 ± 12b
flavonoids rutin 47 ± 0.2a 20 ± 0.1b
apigenin 0.11 ± 0.0a 0.08 ± 0.0a
luteolin 0.81 ± 0.0a 0.28 ± 0.0a
diosmetin 0.57 ± 0.0a 0.19 ± 0.0a
total   48.49 ± 0.2a 20.55 ± 0.1b
total   5853.06 ± 8.8a 19052.4 ± 13.1b
a

Each value represents the mean of three determinations (n = 3) ± standard deviation. Different letters within the same row indicate significant differences (p < 0.05) between the olive roots with different parts (bark and wood).