Table 2: Results of quantification of individual flavonoids, phenolic acids, and xanthines.

Bioactive compoundCalibration curveFraction of flavonoids1Fraction of phenolic acids2Aqueous solution
(mg/g)(mg/g)(mg/g)

Chlorogenic acid ( )2.121.63.0
Caffeic acid ( )1.5ndnd
Rutin ( )5.26.82.3
Quercetin ( )2.2ndnd
Kaempferol ( )4.5ndnd
Caffeine ( )nana5.4
Theobromine ( )nana2.7

1Hydrolyzed fraction of flavonoids, 2nonhydrolyzed fraction of phenolic acids used for the spectrophotometric analysis according to the European pharmacopoeia, and nd: not detected, na: not applicable.