Structural elucidation of new diterpenoids isolated from Rabdosia umbrosa var. leucantha f. Kameba
Abstract
Four new ent-kaurenoids, kamebakaurin, kamebakaurinin, kamebacetal A, and kamebacetal B have been isolated from Rabdosia umbrosa var. leucantha f. Kameba. Their structures have been established on the basis of spectroscopic and chemical evidence.