M. Toyota et al., EUDESMANE-TYPE SESQUITERPENOIDS FROM JAPANESE LIVERWORT FRULLANIA-TAMARISCI SUBSP OBSCURA, Chemical and Pharmaceutical Bulletin, 46(3), 1998, pp. 542-544
The diethyl ether extract of the Japanese livewort Frullania tamarisci
subsp. obscura yielded a new sesquiterpene aldehyde in addition to a
new dimeric sesquiterpenoid with a eudesmane-type carbon skeleton. The
ir structures were established by extensive 2D NMR techniques and chem
ical evidence. They were shown to be 4 alpha,6 alpha-dihydroxy-11(13)-
eudesmen-12-al and its dimer with 4-epiarbusculin A at the C-4 ether l
inkage.