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Terpenes Terpenes U 0200The New Bioactive Diterpenes Cyanthiwigins E-AA from the Jamaican Sponge Myrmekioderma styx. -From the twenty-seven isolated diterpenes twenty-three are unreported natural products. The diterpenes can be divided into four classes according to differences in the seven-membered ring system (some selected examples are drawn). Some of the diterpenes show activities against hepatitis, HIV, and tuberculosis. -(PENG, J.; WALSH, K.; WEEDMAN, V.; BERGTHOLD, J. D.; LYNCH, J.; LIEU, K. L.; BRAUDE, I. A.; KELLY, M.; HAMANN*, M. T.; Tetrahedron 58 (2002) 39, 7809-7819; Dep. Pharmacogn., Sch. Pharm., Univ. Miss., University, MS 38677, USA; Eng.) -Klein 03-155