Isolation and Identification of Flavonoids Accumulated in Proanthocyanidin-free Barley

Flavonoids accumulated in proanthocyanidin-free near-isOgenic lines iso ant.13, iso ant 17, and iso ant 22 of IVishinohoshi, developed by backcross breeding using a leading cultivar, Nishincihoslii, as a recurrent parent and a proanthocyanidinfree mutant as a nonrecurrent parent in Japan, were examined. A new flavanone, (2RS)-dihydrotricin 7-043-n-glucopyranoside (1), known flavanones (2RS)-dihydrotricin (2) and (2RS)-homoeriodictyol (3),_an,41