Jhanidiol-18-monoacetate

Some new diterpenoid oxides have been obtained from Eupatorium jhanii. They are jhanol (12) and its 18-acetate together with jhanidiol (13) and its 18-monoacetate and diacetate. Their structures were established by correlation with manoyl oxide and by an examination of their C n.m.r. spectra. 11/3-Hydro-xymanoyl oxide (14) has been isolated from Juniperus oxycedrus ° A group of new 11-oxomanoyl oxide derivatives (15a—e) has been obtained from Coleus forskohlii (Labiatae). Their oxygenation pattern is reminiscent of that of the tricyclic diterpenoids which have beemobtained from other Coleus species. 

---