T. Hashimoto et al., NOVEL ENT-VIBSANE-TYPE AND DOLABELLANE-TYPE DITERPENOIDS FROM THE LIVERWORT ODONTOSCHISMA-DENUDATUM, Tetrahedron letters, 39(7), 1998, pp. 579-582
From the ether extract of the liverwort Odontoschisma denudatum, three
novel ent-bibsane- and a novel dolabellane-type diterpenoids have bee
n isolated. Their absolute structures were determined by a combination
of PD-NMR X-ray crystallographic analysis, modified Mosher method and
chemical degradation. (C) 1998 Elsevier Science Ltd. All rights reser
ved.