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. 2020 Dec 21;6(12):e05491. doi: 10.1016/j.heliyon.2020.e05491

Table 1.

Polyphenol content of laurel leaves from Greece and Georgia (mean ± SD).

Compounds RT, min Content, μg/g dw
Leaves from Greece
Leaves from Georgia
Free Conjugated Free Conjugated
Hydroxycinnamic acid derivates
1. Rosmarinic acid 6.54 47.5 ± 0.08 -a - -
2. Chlorogenic acid 33.13 243.9 ± 0.36 - - 48.1 ± 0.04
3. Caffeic acid 38.59 586.1 ± 0.67 56.8 ± 0.09 31.4 ± 0.05 789.3 ± 0.81
4. р-Coumaric acid 46.59 151.1 ± 0.12 246.6 ± 0.35 45.3 ± 0.06 375.9 ± 0.36
5. Sinapic acid 47.14 607.7 ± 0.72 560.4 ± 0.52 - 1513.9 ± 1.22
6. Ferulic acid 47.69 300.1 ± 0.41 2193.0 ± 2.11 29.4 ± 0.04 70.4 ± 0.09
7. Cinnamic acid 53.41 135.0 ± 0.11 486.2 ± 0.51 22.7 ± 0.04 513.4 ± 0.71

Hydroxybenzoic acid derivates
8. Gallic acid 9.47 24.8 ± 0.03 - - -
9. Protocatechuic acid 19.19 - 17.2 ± 0.02 13.3 ± 0.02 68.6 ± 0.07
10. Salicylic acid 28.87 207.3 ± 0.36 41.7 ± 0.04 - 29.4 ± 0.03
11. Vanillic acid 37.84 - 83.9 ± 0.12 37.0 ± 0.04 -
12. Syringic acid 39.86 242.0 ± 0.21 19.6 ± 0.01 5.9 ± 0.0 789.1 ± 0.72

Flavonols
13. Myricetin 15.63 124.5 ± 0.11 75.2 ± 0.08 75.5 ± 0.08 47.2 ± 0.04
14. Quercetin 21.46 48.9 ± 0.05 42.3 ± 0.04 65.3 ± 0.07 44.9 ± 0.05
15. Kaempferol 26.78 122.2 ± 0.11 1981.3 ± 2.00 250.7 ± 0.24 688.1 ± 0.70

Flavons
16. Luteolin 23.89 4.8 ± 0.0 388.6 ± 0.36 59.0 ± 0.06 839.1 ± 0.84
17. Apigenin 27.93 268.6 ± 0.26 1433.6 ± 1.12 161.7 ± 0.15 262.7 ± 0.25

Flavanon
18. Hesperetin 16.09 - 116.4 ± 0.11 - 31.2 ± 0.03

Quercetin glycosides
19. Rutin 7.42 217.4 ± 0.20 - - -
20. Hyperoside 8.98 141.8 ± 0.13 - - -
a

Compound not found.