In this work we have isolated and characterized fourtheen diterpenes f
rom the algae Glossophora kunthii. The compounds carrying perhydroazul
enes as a basic skeleton, showed epimeric form at C-9 in relation to d
ictyol-B. This is the first report on the content of xenicanes, crenul
ides and dolabellanes compounds in the algae Glossophora kunthii.