Structural determination of glucosylceramides isolated from marine sponge by fast atom bombardment collision-induced dissociation linked scan at constant B/E
作者:Young Min Ahn、Won-Woong Lee、Jee H. Jung、Sang-gi Lee、Jongki Hong
DOI:10.1002/jms.1678
日期:——
reversed phase high‐performance liquid chromatography from the MeOH extracts of a marine sponge, Haliclona (Reniera) sp., collected from the coast of Ulleung Island, Korea, and analyzed by fast atom bombardment mass spectrometry (FAB–MS) in positive‐ion mode. FAB‐mass spectra of these compounds included protonated molecules [M + H]+ and abundant sodiated molecules [M + Na]+ from a mixture of m‐NBA
通过反相高效液相色谱从韩国Ulleung岛海岸收集的海洋海绵Haliclona(Reniera)sp。的MeOH提取物中分离出五种葡萄糖基神经酰胺(GlcCers),并通过快速原子轰击质谱分析( FAB–MS)在阳离子模式下。这些化合物的FAB-质谱包含的质子化分子[M + H] +和丰富sodiated分子[M +的Na] +从混合物米‐NBA和NaI。通过恒定B / E的FAB联动扫描阐明了这些GlcCer的结构相似。为了找到诊断离子的特征,在恒定B / E下通过碰撞诱导解离(CID)链接扫描对GlcCers进行了分析。以恒定的B / E对[M + H] +和[M + Na] +前体离子进行CID链接扫描,通过一系列解离过程形成了许多特征性产物离子。由电荷-远程断裂形成的产物离子为表征脂肪N-酰基链部分和鞘氨醇碱基(通常称为长链碱基)提供了重要信息。m / z处的产物离子203和502分别诊断出存在糖化糖环和β-