Chemical study of Anthospermum emirnense (Rubiaceae)

Abstract Chemical study of the aerial parts of Anthospermum emirnense led to the isolation of one original iridoid glycoside ( 1 ) along with six known iridoids ( 2–7 ), three lignans ( 8–10 ), two flavonoids ( 11–12 ), one coumarin ( 13 ), two anthraquinones ( 14–15 ), two benzoic acids ( 16–17 ) and three triterpenoids ( 18–20 ). These results are the first chemical data on non-volatile constituents of this genus. The chemotaxonomic significance of these compounds is discussed.