Apoptosis-inducing properties of ent-kaurene-type diterpenoids from the liverwort Jungermannia truncata - Nagashima,F.; Kondoh,M.; Kawase,M.; Simizu,S.; Osada,H.; Fujii,M.; Watanabe,Y.; Sato,M.; Asakawa,Y. (Planta Med, 2003)