Steroid compounds of marine sponges. III. 24-Ethyl-25-methylcholesta-5,22-dien-3β-OL — A new marine sterol from the spongeHalichondria sp.
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A new sterol — 24 ethyl-25-methylcholesta-5,22-dien-3β-ol — has been isolated by column chromatography on silica gel from extracts of the spongeHalichondria sp. Its structure has been established on the basis of an analysis of GLC-MS results and of PMR and13C NMR spectroscopy and has been confirmed by ozonolysis.
KeywordsOleanolic Acid Ecdysone DNPH Zinc Dust Steroid Compound
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