Table 1: Biologically active compounds identified in buckwheat leaf and flower extracts.

Buckwheat leafBuckwheat flower

Phenolic acids
Chlorogenic0.01–0.03%0.25%
Neochlorogenic0.3%0.025%
P-Coumaricn/d+
Ferulicn/d+
Gallicn/dn/d
P-Hydroxybenzoicn/dn/d
Fagopyrin0.05%0.08%
Tannic1.0%5.9%
Flavonoids
Rutin0.27–10.5%7.1–12.0%
Quercetin0.002%0.005%
Quercitrin0.02 0.03%0.35%
Hyperoside0.005–0.015%0.04%

n/d: no data.