Microlepia tenera

Glycosides of -pimarane type diterpenes (544-552) were obtained from Scypholepia hookeriana (331) and Microlepia tenera (332), One of them, hookeroside D (548), is an example of the rare diterpene tetro-sides. 

KuRAism, T., H. Maehashi, T. Murakami, Y. Saiki, and C.-M. Chen Chemical and Chemotaxonomical Studies of Ferns. LX. Chemical Studies on the Constituents of Microlepia tenera Christ. J. Pharmac. Soc. Japan 105, 937 (1985). 

---