ent-6,7-Secokaurane diterpenoids from Rabdosia serra and their cytotoxic activities

Seven enmein-type ent-kauranoids, named as rabdosins E-K, along with twelve known diterpenoids, were isolated from the hydrophobic extract of Rabdosia serra. Weak to moderate cytotoxic activities against two human cancer cell lines were detected.110