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■ Structure Determination of a Violet-Blue Flower Flavonoid, Qurcetin 3-Glucosyl(1→2)gentiobioside from Primula polyantha

Norio Saito, Keiko Yoda, Hideyuki Haruyama, Harumitsu Kuwano, and Toshio Honda*

*Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan

Abstract

The chemical structure of quercetin 3-glucosyl(1→2)gentiobioside, isolated from the violet blue flowers of Primura polyantha was determined to be quercetin 3-O-(β-D-glucopyranosyl(1→2)-O-β-D-glucopyranosyl(1→6))-β-D-glucopyranoside unambiguously based on the spectroscopic data.