TERPENOID CONSTITUENTS OF THE NEW-ZEALAND LIVERWORT JAMESONIELLA-TASMANICA

The structures of 10 diterpenoids, isolated from the ether extract of the New Zealand liverwort Jamesoniella tasmanica, have been establishe d by extensive 2D NMR techniques. They were shown to be 13-epi-neoverr ucosane-, ent-kaurane- and 13-epi-neohomoverrucosane-type diterpenoids . This is the first report of the isolation of a 13-epi-neohomoverruco sane-type diterpenoid, although biosynthetically it is an expected con stituent of liverworts. Copyright (C) 1996 Elsevier Science Ltd