Chemical constituents of the liverworts Plagiochasma japonica and Marchantia tosana

A new compound phenanthrene type was isolated from the methanolic extract o f the liverwort Marchantia tosana, together with the bibenzyl lunularin, p- hydroxybenzaldeyde and stigmasterol. The structure of the new compound was established as 2,7-dimethoxy-3-hydroxy-phenanthrene on the basis of its spe ctroscopic data. From the methanolic extract of the liverwort Plagiochasma japonica which has not been investigated before the diterpene 2-phyten-1-ol , the triterpene alpha -zeorin, the macrocyclic bis-bibenzyl riccardin D an d stigmasterol have been isolated.