Meyeniihydantoins A–C, three novel hydantoin derivatives from the roots of Lepidium meyenii Walp

A new natural product meyeniihydantoin A (1), and two new hydantoin derivatives, named meyeniihydantoins B–C (2–3) were isolated from the roots of Lepidium meyenii. Their structures were characterized by means of extensive spectroscopic analyses. The isolated meyeniihydantoins were evaluated for their cytotoxicities on NB4, A549, SHSY5Y, PC3 and MCF7 human cancer cell lines.