A new gymnomitrane-type sesquiterpenoid, (-)-gymnomitr-8(12)-en-9 beta
-ol, was isolated from the liverwort Marsupella aquatica together with
the previously known marsupellone, acetoxymarsupellone, marsupellol a
nd beta-ylangen-4 alpha-ol and their structures determined by extensiv
e NMR techniques and chemical transformation. The absolute structure o
f (+)-eremophila-9,11-dien-8 alpha-ol was established by the CD spectr
um.