Monoamine Oxidase-A Inhibition and Associated Antioxidant Activity in Plant Extracts with Potential Antidepressant Actions

Table 1

Compounds identified in H. perforatum.

Compounds	ESI-neg. ion	UV max (DAD)
Naphthodianthrones
Pseudohypericin	519	547, 590
Hypericin	503	547, 590
Protopseudohypericin	521	370, 539
Protohypericin	505	370, 539
Phenolic comp.
Chlorogenic acid	353	324
Rutin	609	256, 355
Hyperoside	463	256, 355
Isoquercitrin	463	256, 355
Miquelianin	477	256, 355
Acetyl hyperoside	505	263, 352
Quercitrin	447	255, 348
Quercetin	301	255, 369
Biapigenin	537	268, 331
Phloroglucinols
	467	274
	481	274
	535	274
	549	274

compounds gave also their corresponding (M + H)⁺ and (M + K)⁺ ions under ESI-positive ionization.