Flavonoid glycosides and phenolic acids from Ehretia thyrsiflora

Chemical constituents of the leaves of Ehretia thyrsiflora were continuously investigated. Twelve compounds including six flavonoids and six phenolic acids, isoquercetrin, hyperoside, trifolin, astragalin, kaempferol 3-O-arabinosylgalactoside, quercetin 3-O-arabinosylgalactoside, rosmarinic acid, cinnamic acid, icariside E5, ferulic acid, α-hydroxydihydrocaffeic acid, lithospermic acid B were first isolated from this species. The considerable phenolic compounds existed in this species have important systematic significance in the argument of the family the Boraginaceae.