ABSTRACT
Six organic compounds were isolated from the marine sponge Topsentia sp. collected from the South China Sea. Their chemical structures were identified by 1H-NMR, 13C-NMR,IR,MS and GC-MS as cholesterol(Ⅰ); 24-ethylidenecholest-5-en-3?-ol(Ⅱ); phenylacetic acid(Ⅲ); 4-hydroxybenzaldehyde(Ⅳ);indole-3-carboxaldehyde(Ⅴ); thymine(Ⅵ).
ABSTRACT
Five compounds were isolated from the ethyl acetate extract of the marine sponge Cin-achyrella australiansis collected from the South China Sea. Their structures were identified by IR,1 H-NMR,13C-NMR,MS as the follows : 24-ethyl-cholest-4-en-3-one(Ⅰ), cholesterol (Ⅱ), benzene- ac-etamide(Ⅲ), p-hydroxyphenylacetamide(Ⅳ), indole-3-acetamide(Ⅴ).
ABSTRACT
Marine Glycosphingolipids(GSLs) compounds mainly come from marine ogranisms of marine sponge and starfish. The advances of study on GSLs compounds in recent two decades were reviewed. The relationship between chemical structure and biological functions of GSLs compounds was also described.
ABSTRACT
Four organic compounds were isolated from the ethyl acetate soluble fraction of the marine sponge Clathria fasciculate which collected from the South China Sea. Their structures were determined by GC-MS, FAB, IR, 1HNMR, 13CNMR and COSY spectra as: clolest-4-en-3-one(Ⅰ). stigmast-4-en-3-one(Ⅱ). (Z)-17-tetracosene-l-ol(Ⅲ) and3-(17Z-tetracosenyloxy)-1 , 2-propanediol(Ⅳ). It's the second report of the first serial studies of the chemical constituents of the marine sponge Clathria fasciculate.