Iridoid glucosides from three veronica species

Abstract

A new iridoid glucoside, 6′- O-menthiafoloylmussaenosidic acid, was isolated from the methanolic extract of Veronica bellidioides along with 11 known iridoid glucosides and the aromatic glucosides, picein and 4- O-glucopyranosylzingeron. The structure of the new iridoid was elucidated on the basis of its spectral data. Geniposidic acid and 4- O-glucopyranosylzingeron were found for the first time in the genus Veronica and verminoside in V. bellidioides. Nine known iridoids of which the major ones were mussaenoside and aucubin were found in V. alpina, and nine known iridoids with amphicoside as the major one were found V. kellererii.