Isolongirabdiol, a New Diterpenoid from Rabdosia longituba

A new ent-spirosecokaurene diterpenoid, named isolongirabdiol, was isolated from the aerial parts of Rabdosia longituba together with the known compounds oridonin, lasiokaurin, and nodosin. The structure of the new compound was elucidated on the basis of spectroscopic and chemical evidence