Ml. Bourguetkondracki et al., 12-EPI-HETERONEMIN - NEW SESTERTERPENE FROM THE MARINE SPONGE HYRTIOS-ERECTA, Tetrahedron letters, 35(1), 1994, pp. 109-110
12-epi-heteronemin, a novel tetracarbocyclic sesterterpene was isolate
d from the marine sponge Hyrtios erecta and its structure has been est
ablished through spectral studies.