Strigone, isolation and identification as a natural strigolactone from Houttuynia cordata

► Characterization of known strigolactones produced by Houttuynia cordata. ► Isolation and identification of a strigolactone, named strigone. ► Germination stimulation activities of four stereoisomers of strigone. ► Natural strigone is highly active on Striga hermonthica but less active on Orobanche minor.