Sesquiterpene constituents of two liverworts of genus diplophyllum
作者:Yoshimoto Ohta、Niels H. Andersen、C.-B. Liu
DOI:10.1016/0040-4020(77)80301-3
日期:——
ent-eudesmanolide. The structure of diplophyllin was established by correlation with tetrahydro-isoalantolactone (17). In addition, the enantiomers of diplophyllin and diplophyllolide-A (16) were obtained on acid isomerization of isoalantolacetone (14a). Diplophyllin shows significantly greater activity against human epidermoid carcinoma (KB cell culture, ED50⋍ 8 μ ) than its enantiomer: the first demonstration
作者:Jörg Spörle、Hans Becker、Noris Salazar Allen、Mahabir P. Gupta
DOI:10.1016/s0031-9422(00)98249-9
日期:1991.1
Abstract Three noveldimeric spiroterpenoids, two C35-terpenoids (eudesmane-fusicoccane) and one C30-terpenoid(eudesmane-aromadendrane) which might be biosynthesized via Diels—Alder like reaction were isolated from the Panamanian liverwort Plagiochila moritziana. The structures were elucidated by extensive NMR studies. Additionally, several known bicyclogermacrane, gymnomitrane, eudesmane, aromadendrane