Home /Constituents of cupuliferae, XIII: New and revised structures of acylated flavonoids from Quercus Suber L.

Constituents of cupuliferae, XIII: New and revised structures of acylated flavonoids from Quercus Suber L.

TitleConstituents of cupuliferae, XIII: New and revised structures of acylated flavonoids from Quercus Suber L.
Publication TypeJournal Article
Year of Publication1991
AuthorsRomussi, G., Bignardi G., Pizza C., & De Tommasi N.
JournalArchiv der Pharmazie
Volume324
Pagination519-524
Keywordsacylated flavonoids, glycosides, Quercus suber
Abstract

From leaves of Quercus suber L. in addition to ten known glycosides, two new acylated flavonoids have been isolated and identified as 3-O-kaempferol 2-O-(trans-p-coumaroyl)-β-D-glucopyranoside (1) and 3-O-kaempferol 2,3-di-O-acetyl-4-O-(cis-p-coumaroyl)-6-O-(trans-p-coumaroyl)-β-D-glucopyranoside (3). The structures of the previously described 3-O-kaempferol 2,4-di-O-(trans-p-coumaroyl)-β-D-glucopyranoside2) and 3-O-kaempferol 3,6-di-O-acetyl-2,4-di-O-(trans-p-coumaroyl)-β-D-glucopyranoside3) were revised to 3-O-kaempferol 2,6-di-O-(trans-p-coumaroyl)-β-D-glucopyranoside (4) and 3-O-kaempferol 3,4-di-O-acetyl-2,6-di-O-(trans-p-coumaroyl)-β-D-glu-copyranoside (5).