European Journal of Biomedical and Pharmaceutical Sciences

FLAVONOID GLYCOSIDES FROM THE LEAVES OF MAGNOLIA TIEPII (MAGNOLIACEAE)

Pham Van Huyen, Tran Thi Ngoc Hanh, Tran Ngoc Huyen Vi, Nguyen Huu Huong Duyen, Nguyen Thi Thu Hien, Nguyen Thi Dieu Thuan and Nguyen Huu Toan Phan*

ABSTRACT

Magnolia tiepii V. T. Tran & N. V. Duy sp. nov. (Magnoliaceae) is recognized from southern Vietnam, where it occurs in Khanh Vinh slope, Khanh Vinh District, Khanh Hoa Province. Four flavonoid glycosides were isolated from the leaves of Magnolia tiepii, including kaempferol 3-neohesperidoside (1), kaempferol 3-O-α-L -rhamnopyranosyl-(1→2)--D-galactopyranoside (2), quercetin 3-neohesperidoside (3), and quercetin 3-O-α-L-rhamnopyranosyl-(1→2)--D-galactopyranoside (4). Their chemical structures were elucidated by spectrocopic NMR, MS, and IR analysis as well as comparing their data with the ones in the literature. Although these compounds were known in other plants but this is the first time they are reported in this species.

Keywords: Magnolia tiepii, kaempferol, quercetin, flavonoid glycoside.