Isolation and structure elucidation of a new flavonol glycoside from Sabia Parviflora

A new flavonol glycoside named Sabiapside A (1), along with four known compounds, quercetin-3-O-gentiobioside (2), camellianoside (3), isobariclisin-3-O- rutinoside (4), tsubakioside A (5), was isolated from Sabia parviflora. Their structures were elucidated by extensive spectroscopic analysis including MS, UV, IR and NMR data. The antioxidant activities of these glycosides evaluated by ABTS(+) and DPPH radical scavenging reaction was higher than that of vitamin C used as the reference antioxidant.

Automated summary

A new flavonol glycoside, Sabiapside A, and four known compounds were isolated from Sabia parviflora, showing higher antioxidant activities compared to vitamin C. This finding is significant for studying the pharmacology and health benefits of natural products from plants.