Hydrastine is a natural product found in Hydrastis canadensis. It has a role as a metabolite.

Echinacoside is a natural polyphenolic compound, has various kinds of pharmacological activities, such as anti-senescence, anti-hypoxia, anti-cancer, anti-osteoporosis, antioxidative, anti-inflammatory, neuroprotective, hepatoprotective, nitric oxide radical-scavenging and vasodilative ones. Echinacoside can improve the hematopoietic function of bone marrow in 5-FU-induced myelosuppression mice, it induces apoptotic cancer cell death by inhibiting the nucleotide pool sanitizing enzyme MTH1. Echinacoside inhibits cytochrome c release and caspase-3 activation caused by ensuing rotenone exposure via activating Trk-extracellular signal-regulated kinase (ERK) pathway in neuronal cells.

Homovanillic acid is a monocarboxylic acid that is the 3-O-methyl ether of (3,4-dihydroxyphenyl)acetic acid. It is a catecholamine metabolite. It has a role as a mouse metabolite and a human metabolite. It is a member of guaiacols and a monocarboxylic acid. It is functionally related to a (3,4-dihydroxyphenyl)acetic acid. It is a conjugate acid of a homovanillate. Homovanillic acid is used as a reagent to detect oxidative enzymes, and is associated with dopamine levels in the brain. Abnormalities in white matter were associated with low CSF Homovanillic acid.

Annulatin is an ether and a member of flavonoids.

Genistein, a phytoestrogen found in soy products, is a highly specific inhibitor of protein tyrosine kinase (PTK) which blocks the mitogenic effect mediated by EGF on NIH-3T3 cells with IC50 of 12μM or by insulin with IC50 of 19 μM. Genistein has neuroprotective, antitumor effects, it modulates the expression of NF-κB and MAPK (p-38 and ERK1/2), thereby attenuating d-Galactosamine induced fulminant hepatic failure in Wistar rats. Genistein is a 7-hydroxyisoflavone with additional hydroxy groups at positions 5 and 4'. It is a phytoestrogenic isoflavone with antioxidant properties. It has a role as a geroprotector, an antineoplastic agent, a tyrosine kinase inhibitor, an EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor, a plant metabolite, a phytoestrogen and a human urinary metabolite. It is a conjugate acid of a genistein(1-).

Ombuoside is a glycosyloxyflavone that is ombuin attached to a rutinoside residue at position 3 via a glycosidic linkage. It has a role as an antibacterial agent, a radical scavenger, a neuroprotective agent and a plant metabolite. It is a dimethoxyflavone, a rutinoside, a dihydroxyflavone, a glycosyloxyflavone and a disaccharide derivative. It is functionally related to a rutinose and an ombuin. Ombuoside has antifungal activity. Ombuoside shows significant antioxidant activity in the DPPH, and TEAC, reducing power assays.