Flavonoid Constituents from Spiraea brahuica

Sparins A–C (1–3, resp.), three new flavonoids, were isolated from the CHCl3 subfraction of the EtOH extract of the whole plant of Spiraea brahuica, along with 3′,7-di-O-methylquercetin (4) and luteolin 7-β-D-glucopyranoside (5), reported for the first time from this species. The structures of the new compounds were elucidated by spectroscopic techniques including MS and 2D-NMR spectroscopy.