TWO GALLATES FROM QUERCUS GLAUCA

Article abstract of DOI:10.1016/0031-9422(92)83300-N

Two novel phenol glucoside gallates, querglanin and isoquerglanin, were isolated from the leaves of Quercus glauca.From chemical and spectroscopic evidence, they were characterized as 2-iso-propyl-4-hydroxyl-5-methyl phenol 1-O-β-D-(6'-O-galloyl)glucopyranoside and 2-iso-propyl-4-hydroxyl-5-methyl phenol 1-O-β-D-(3'-O-galloyl)glucopyranoside, respectively.In addition, the occurence of seven known flavonoids was demonstrated. Key Word Index - Quercus glauca; Fagaceae; phenol glycoside gallates; 2-iso-propyl-4-hydroxyl-5-methyl phenol 1-O-β-D-(6'-O-galloyl)glucopyranoside; 2-iso-propyl-4-hydroxyl-5-methyl phenol 1-O-β-D-(3'-O-galloyl)glucopyranoside; querglanin; isoquerglanin.