New acorane- and cuparane-type sesqui- and new labdane- and seco- labdane-type diterpenoids from the Japanese Liverwort Jungermannia infusca (Mitt.) Steph.

Article abstract of DOI:10.1016/S0040-4020(99)00476-7

A new acorane- and five new cuparane-type sesqui- and two new labdane- and two new seco-labdane-type diterpenoids have been isolated from the Japanese liverwort Jungermannia infusca (Mitt.) Steph., together with previously known sesquiand diterpenoids. Their structures were determined by extensive NMR techniques, chemical degradation and X-ray crystallographic analysis.