Pharmacognostic investigations of the aerial parts of Chenopodium foliosum Asch. and radical-scavenging activities of five flavonoids isolated from methanol extract of the plant, Kokanova-Nedialkova, Zlatina, Nedialkov Paraskev T., and Nikolov Stefan D. , Pharmacognosy Journal, 26th May 2014, Volume 6, Issue 4, p.43-48, (2014)