Two acylated flavonoid glycosides from the leaves of Quercus dentata

摘要

Two new acylated flavonoid glycosides have been isolated from the leaves of Quercus dentata Thunb. On the basis of chemical and spectral data, the structures of the compounds have been elucidated as kaempferol 3-O-(2″, 4″-diacetyl-3″-cis-p-coumaroyl-6″-trans-p-coumaroyl) -β-D-glucopyranoside (1), and kaempferol 3-O-(2″-trans-p-coumaroyl- 3″, 4″-diacetyl-6″-cis-p-coumaroyl)-β-D-glucopyranoside (2).