A new isoflavone glycoside from flowers of Pueraria Montana var. lobata (Willd.) Sanjappa & Pradeep

Abstract

A new isoflavone glycoside, named 3'-hydroxytectorigenin-7-O-β-D-xylosyl-(1→6)-β-D-glucopyranoside (1) was isolated from the flowers of Pueraria montana var. lobata (Willd.) Sanjappa & Pradeep. The structure of compound 1 was characterised by HR-ESI-MS and NMR spectroscopic methods. In radical scavenging activity test using 2, 2-diphenyl-1-picrylhydrazyl (DPPH), compound 1 showed moderate activity with IC₅₀ value of 42 ± 4.2 μg/mL.

Keywords: 3’-hydroxy -tectorigenin-7-O-β-D-xylosyl-(1→6)-β-D-glucopyranoside; Pueraria montana var. lobata; isoflavone glycoside; radical scavenging activity.