Tác dụng ức chế sản sinh NO in vitro của hai hợp chất kaempferol glycosid phân lập từ phần trên mặt đất của cây bồ giác (Psychotria asiatica L.)

Abstract

From the aqueous fractions of the ethanol mot extracts of Psychotria asiatica L collected In Son Tay (Ha Noi), two kaempferol glycosides were isolated by chromotography and identified as kaempferol 3-O-(2,6-di-α-L-rhamnopyranosyl)-β-D-galactopyranoside and kaempferol 3-O-β-D-apiofuranosyl -(1→2)-O-[α-L-rhamnopyranosyl-(1→6)]-β-D-galactopyranoside. Their structures were elucidated by ¹H, ¹³HC. HSQC and HMBC. Both compounds were isolated from the Psychotria genus for the first time.