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Alla G. Guzii Vladimir A. Denisenko Pavel S. Dmitrenok Yuliya V. Burtseva Vladimir B. Krasokhin Valentin A. Stonik 《Tetrahedron letters》2008,49(50):7191-7193
Three new marine polar steroids, the first chlorine-containing steroid sulfate (1), topsentiasterol sulfate F (2) and the first natural iodinated steroid (3) have been isolated from the marine sponge Topsentia sp. The structures of 1-3 were elucidated using NMR and HRESIMS as well as by chemical correlation of 1 with previously known topsentiasterol sulfate D. Compound 1 proved to be an effective inhibitor of endo-1,3-β-d-glucanase from the marine mollusc Spisula sachalinensis. 相似文献
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Two new polyhydroxysteroids, 12β,16β,20-trihydroxycholesta-1,4-dien-3-one 16-acetate(1) and 24- methyl-12β,16β,20-trihydroxycholesta-1,4-dien-3-one(2) were isolated from octocoral Sinularia sp. Their structures were elucidated primarily on the basis of 1D and 2D NMR and the mass spectroscopic studies. The cytotoxicity of these compounds against three tumor cell lines was also reported. 相似文献
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