Terpenoid Content of the Antarctic Soft Coral Alcyonium antarcticum

Chemical investigation of the soft coral Alcyonium antarcticum, collected off Terra Nova Bay, resulted in the isolation of two closely related sesquiterpenes, alcyoniccne (1) and deacetoxy-alcyonicene (2), along with known terpenoid compounds. The structure elucidation of the new molecules, possessing a rare bulgarane skeleton, has been made mainly by NMR techniques.