The analysis of the polar fraction of Galeopsis angustifolia Ehrh. ex Hoffm. indicates that the main components are iridoids and flavonoids. Six compounds were identified: a new flavonoid, 3'-hydroxy-isoscutellarein 7-O-[6'″acetyl-β-D-glucopyranosyl-(1 → 2)-β-D-glucopyranoside]; three iridoid