Fig. 1

Chemical structures of flavonoids (1–5) isolated from n-BuOH extract of aerial parts of G. grandulosum Turill. 1:chrysoeriol-7-O-β-D-xyloside; 2:luteolin-7-O-β-D-apiofuranosyl-(1 → 2)-β-D-xylopyranoside; 3: chrysoeriol-7-O-β-D-apiofuranosyl-(1 → 2)-β-D-xylopyranoside; 4: chrysoeriol-7-O-α-L-rhamnopyranosyl-(1 → 6)-β-D-(4"-hydrogenosulfate) glucopyranoside; 5:Isorhamnetin-3-O-α-L-rhamnopyranosyl-(1 → 6)-β-D-glucopyranoside