title: A new cyclized 9,11-secosterol enol-ether from the australian sponge euryspongia arenaria
abstract: The polar fraction of the crude extract from the sponge Euryspongia arenaria was separated by chromatography. Structure elucidation by spectrometric methods allowed the identification of a new steroid, stellattasterenol (2), containing an unprecedented seven-membered cyclic enol-ether in ring C. A related known compound, stellettasterol (3), a pentahydroxy-9,11-secosteroid, was also identified.
authors.affiliation: Department of Chemistry, The University of Newcastle, Callaghan, NSW, 2308, Australia, and CSIRO Marine Research, GPO Box 1538, Hobart, Tasmania, 7001, Australia.
authors.lastname: van Altena IA
authors.initials: AJ
authors.lastname: Butler
authors.initials: SJ
authors.lastname: Dunne