A new flavonol glycoside,namely quercetin 3-O-[a-D-apiofuranosyl(1–5)-b-D-apiofuranosyl(1–2)]-a-L-rhamnopyranosyl(1–6)-b-D-glucopyranoside(1),was isolated from glandless cotton seeds together with the known compounds quercetin 3-O-a-L-rhamnopyranosyl(1–2)-[a-Lrhamnopyranosyl(1–6)]-b-D-glucopyranoside(manghaslin,2),kaempferol 3-O-b-D-apiofruranosyl(1–2)-b-D-glucopyranoside(3)and kaempferol 3-O-a-L-rhamnopyranosyl(1–6)-b-D-glucopyranoside(4).It is interesting that the tetrasaccharide fragment of 1 contained both a b-apiosyl and an unusual a-apiosyl group.
