Studies of Australian soft corals. XXX. A novel trisnorsesquiterpene from a <i>Cespitularia</i> species and the isolation of guaiazulene from a small blue <i>Alcyonium</i> species

Abstract

A novel trisnorsesquiterpene (1,4-dimethyl-2,3,3a,4,5,6-hexahydroazulene) and an optical antipode of the known sesquiterpene cubebol have been isolated from the soft coral Cespitularia species. The pigment in a small blue Alcyonium species has been identified as guaiazulene.