Xr. Wang et al., STRUCTURES OF MACROCALYXIN-B, MACROCALYXIN-F, MACROCALYXIN-G AND MACROCALYXIN-H, AND MAOYERABDOSIN FROM ISODON-MACROCALYX, Phytochemistry, 38(4), 1995, pp. 921-926
Four new diterpenoids, macrocalyxins B, F, G, and H, together with mao
yerabdosin and the known rabdophyllin H, ponicidin, oridonin, and enme
nol, were isolated from the leaves of Iosdon macrocalyx and their stru
ctures were elucidated from spectral and chemical evidence.