Free flavonoid aglycones from Thymus Herba Barona and its monoterpenoid chemotypes

International audience; From the diethyl ether extracts of the aerial parts of Thymus herba barona, the flavanones eriodictyol,naringenin and the flavones luteolin, sorbifolin, thymusin, cirsiliol, apigenin, sideritoflavone, cirsimaritin, cirsilineol, xanthomicrol, 8-methoxycirsilineol and genkwanin were isolated and characterized. This is the first report of sorbifolin and cirsiliol in the genus Thymus. The distribution of these flavonoids in the seven terpenoid chemotypes of T. herba barona growing in Corsica was studied and the chemotaxonomic implications of this data discussed.