Cardiac and Vascular Synergic Protective Effect of Olea europea L. Leaves and Hibiscus sabdariffa L. Flower Extracts

Table 1

UV absorption bands, mass spectrometry, and quantitative analysis of hibiscus acid and phenolic compounds in HSE and OEE.

Compound	(nm)	Mass spectrometry data			Quantitative data (mg g^−1)
		MW	[M-H]^−	Main fragments	OEE	HSE
Hibiscus acid^1	—	190	189		—	139.2 ± 0.47
Secoiridoids
Hydroxyoleuropein^2	280	556	555	539, 377, 197	8.96 ± 0.42	—
Elenolic acid glucoside^2	240	404	—	—	23.65 ± 0.79	—
Oleuropein^2	280	540	539	377, 197	215.1 ± 1.64	—
Oleuropein isomer^2	280	540	523	377, 197	51.09 ± 0.35	—
Ligstroside^2	280	524	523	361, 191	11.03 ± 0.04	—
Hydroxycinnamic acids
Verbascoside^3	320	624	623	461, 315, 135	4.67 ± 0.44	—
Flavonols
Rutin^4	345	610	609	301, 179	0.69 ± 0.06	—
Flavones
Luteolin-7-O-rutinoside^5	345	594	593	447, 285	0.74 ± 0.04	—
Luteolin-7-O-glucoside^5	345	448	447	285	5.83 ± 0.24	—
Luteolin-4-O-glucoside^5	345	448	447	285	4.20 ± 0.12	—

Hibiscus acid and phenolic compounds quantified as: ¹vanillic acid mg/g; ²oleuropein mg/g; ³verbascoside mg/g; ⁴rutin mg/g; ⁵apigenin mg/g. Values are means ± S.D. ().