dichroism (ECD) calculations. Among the isolated compounds, sterol 1 possessed a rare side chain with a methoxy group at C-23, and a double bond between C-24 and C-25. Ceramides 6 and 7 possessed 14 carbons in their long-chain fatty acid base (FAB), which were different from the normal ceramides with 16 carbons in the FAB. Moreover, compounds 5 and 8 were isolated for the first time from marine bryozoans
一种新的
固醇,(23R)-甲氧基胆甾-5,24-二烯-3β-醇(1),两种新的神经酰胺,(2S,3R,4E,8E)-2-(
十四烷酰
氨基)-4,8-
十八碳烯基-1 ,3
-二醇(6)和(2S,3R,2'R,4E,8E)-2-(
十四烷酰
氨基)-4,8-
十八烷基-1,3,2'-三醇(7),以及三个已知的从中国黄岛采集的海洋苔藓虫隐孢子虫(Cryptosula pallasiana)中分离出
甾醇(2-4),内酯(5)和两种神经酰胺(8,9)。通过广泛的光谱分析,
化学方法和量子电子圆二色性(
ECD)计算,阐明了新化合物的结构。在分离的化合物中,
固醇1具有在C-23具有甲氧基的稀有侧链以及在C-24和C-25之间的双键。神经酰胺6和7在其长链
脂肪酸碱(FAB)中具有14个碳,与FAB中含16个碳的普通神经酰胺不同。此外,化合物5和8首次从海洋苔藓动物中分离出来。评价化合物1-9对人肿瘤
细胞系HL