A new iridoid glycoside from the root of Psychotria rubra

Abstract Phytochemical investigation on the root of Psychotria rubra led to the isolation of two iridoid glycosides ( 1 , 4 ), two flavones ( 2 – 3 ). To our knowledge, all compounds were isolated from this plant for the first time. Compound 1 (psyrubrin A) was a new compound, and compounds 2–4 were reported for the first time from the genus Psychotria . The chemotaxonomic significances of these compounds were summarized.