CIS- AND TRANS-DIHYDROQUERCETIN GLUCOSIDES FROM NEEDLES OF PINUS SYLVESTRIS

Article abstract of DOI:10.1016/0031-9422(88)84101-3

Key Word Index-Pinus sylvestris; Pinaceae; cis- and trans-dihydroflavonol glycosides; flavanone glucoside; dihydroquercetin; dihydromyricetin; eriodictyol cis-trans isomerism; chemotypes. (-)-cis-2,3-Dihydroquercetin (presumably as the 3'-O-β-D-glucopyranoside); the 3'-O-D-glucopyranosides of (+)-trans-2,3-dihydroquercetin, dihydroquercetin, dihydromyricetin and eriodictyol; (+)-catechin and (+)-gallocatechin have been isolated from the needles of Pinus sylvestris.The dihydroquercetin aglycones interconvert in methanolic solution.Two chemotypes of Pinus sylvestris can be distinguished on the basis of their dihydroquercetin , dihydromyricetin and eriodictyol contents.