采自南中国海的海藻叶托马尾藻用乙醇提取、乙酸乙酯－水分配后，乙酸乙酯相中的提取物经硅胶减压柱色谱分离得到甾醇和脂肪酸两大组分。用ＧＣ／ＭＳ联用技术对它们进行了分离和鉴定。通过硅胶快速柱色谱，从混合甾醇中分离出一个主成分，经波谱分析鉴定为岩藻甾醇。 Sargassum algae from the South China Sea was extracted with ethanol. After ethyl acetate-water partitioning, the extracts from the ethyl acetate phase were separated by silica gel column chromatography under reduced pressure to obtain the two major components of sterols and fatty acids. They were isolated and identified by GC / MS. A principal component was isolated from the mixed sterol by silica gel flash column chromatography and identified as fumaglitol by spectral analysis.