Phytochemical analysis on the aerial parts of Teucrium capitatum L. with aspects of chemosystematics and ethnobotany.

The phytochemical analysis on the aerial parts of Teucrium capitatum L. collected from a new population in Central Italy, led to the identification of eight compounds, i.e. pheophytin a ( 1 ), poliumoside ( 2 ), apigenin ( 3 ), luteolin ( 4 ), cirsimaritin ( 5 ), cirsiliol ( 6 ), 8- O -acetyl-harpagide ( 7 ) and teucardoside ( 8 ) belonging to four different classes of secondary metabolites. Pheophytin a ( 1 ) represents a newly identified compound in the genus whereas compounds ( 7-8 ) are newly identified compound in the species. The chemotaxonomic and ethnobotanical aspects relative to the presence of these compounds were widely discussed suggesting important conclusions for both.