KAEMPFEROL, QUERCETIN VÀ DẪN XUẤT DIGLYCOSID CỦA CHÚNG TÁCH TỪ LÁ CHAY BẮC BỘ (Artocarpus tonkinensis)

The present study reported the isolation and identification of five flavonols named kaempferol, kaempferol 3-rutinoside, kaempferol 3-neohesperidoside, quercetin-3-O--D-glucopyranoside and quercetin 3-rutinoside from the leaves of Artocarpus tonkinensis A. Chev. ex Gagnep. Their structures were identified by combination of spectroscopic methods (NMR, HR-ESI-MS) and comparison with reported data. Three flavonol glycosides kaempferol 3-rutinoside, kaempferol 3-neohesperidoside and quercetin 3-rutinoside were found for the first time in the genus Artocarpus J.R. Forst. & G. Forst.