Table 2.

Phenolic composition of investigated Hypericum species extracts (HPLC analysis).

	Percentage (%) of identified compounds (mg/100mg de)
Source	Phenolic acids		Flavonoids		Phloroglucinols	Naphtodianthrones
	Chlorogenic	Caffeic	Rutin	Quercitrin	Hyperforin	Hypericin
1 (H. perforatum)	0.38 ± 0.02	0.06 ± 0.005	0.33 ± 0.05	0.09 ± 0.004	0.78 ± 0.11	0.72 ± 0.09
2 (H. perforatum)	0.37 ± 0.04	0.07 ± 0.002	0.34 ± 0.02	0.11 ± 0.009	0.76 ± 0.07	0.56 ± 0.07
3 (H. perforatum)	0.44 ± 0.01	0.07 ± 0.001	0.36 ± 0.04	0.12 ± 0.008	1.71 ± 0.09	0.98 ± 0.11
4 (H. perforatum)	0.65 ± 0.03	n.d.	0.66 ± 0.07	0.19 ± 0.006	1.41 ± 0.12	1.11 ± 0.13
5 (Hyperici herba)	0.49 ± 0.05	0.08 ± 0.003	0.39 ± 0.03	0.15 ± 0.005	0.66 ± 0.08	0.59 ± 0.08
6 (H. perforatum)	0.38 ± 0.02	0.06 ± 0.002	0.34 ± 0.05	0.09 ± 0.003	0.91 ± 0.07	0.67 ± 0.05
7 (H. maculatum)	1.00 ± 0.04	0.17 ± 0.006	0.90 ± 0.09	0.25 ± 0.011	n.d.	n.d.
8 (H. richeri)	1.30 ± 0.06	0.07 ± 0.003	0.34 ± 0.02	0.09 ± 0.004	0.71 ± 0.09	n.d.
9 (H. olympicum)	0.38 ± 0.01	0.06 ± 0.001	0.32 ± 0.04	0.10 ± 0.002	1.82 ± 0.11	0.41 0.09
10 (H. barbatum)	0.49 ± 0.05	0.10 ± 0.004	0.39 ± 0.06	0.23 ± 0.009	2.97 ± 0.15	0.91 ± 0.11
Retention Times	1.39	1.55	1.67	1.80	6.83	7.91
Trendline equation	y = 6595.3x + 56.447	y = 11261x − 50.639	y= 453.2x − 105.2	y = 18924x − 55.18	y = 5473.7x − 14.86	y = 5572x − 3.0979
R-Squared value	R2 = 0.9985	R2 = 0.9975	R2 = 0.9974	R2 = 0.9991	R2 = 0.9989	R2 = 0.9973

n.d.—not detectable.