CHEMICAL CONSTITUENTS OF THE LIVERWORT PREISSIA QUADRATA (SCOP.) NEES

Abstract

  The ether and methanol extract of Preissia quadrata (Scop.) Nees contained not only various sesquiterpenes but also two cyclic bis(bibenzyls), riccardin B and neomarchantin A. The terpenoids and bis(bibenzyl) constituents found in the present species are not closely related to those of Conocephalum, but to some Marchantia species.