Dasgupta A, Ayanoglu E, Djerassi C
Lipids. 1984 Oct;19(10):768-76. doi: 10.1007/BF02534470.
The phospholipids of the sponge Strongylophora durissima were analyzed. The major phospholipids present were phosphatidylethanolamine (PE), phosphatidylcholine (PC), phosphatidylserine (PS), phosphatidylglycerol (PG) and phosphatidylinositol (PI). The major fatty acid components of the phospholipids consisted of short chain (C14-C19) and very long chain (C25 -C30) "Demospongic" acids. Three novel branched delta 5 monounsaturated acids, Z-19-methyl-5-pentacosenoic, Z-19-methyl-5-hexacosenoic and Z-19-methyl-5-heptacosenoic acids were encountered in the sponge. The 3-saturated counterparts of these compounds, 19-methylpentacosanoic, 19-methylhexacosanoic and 19-methylheptacosanoic acids, as well as 19-methyltetracosanoic and 20-methyloctacosanoic acids also are hitherto undescribed acids present in the sponge. Trace amounts of 2 very long chain acids also were detected and their structures tentatively assigned as 19,21-dimethylheptacosanoic and 20,22-dimethyloctacosanoic acids. The distribution of these fatty acids according to phospholipid head groups also was described.
对硬海绵（Strongylophora durissima）的磷脂进行了分析。主要的磷脂包括磷脂酰乙醇胺（PE）、磷脂酰胆碱（PC）、磷脂酰丝氨酸（PS）、磷脂酰甘油（PG）和磷脂酰肌醇（PI）。磷脂的主要脂肪酸成分由短链（C14 - C19）和极长链（C25 - C30）的“海绵酸”组成。在该海绵中发现了三种新型的支链δ5单不饱和酸，即Z - 19 - 甲基 - 5 - 二十五碳烯酸、Z - 19 - 甲基 - 5 - 二十六碳烯酸和Z - 19 - 甲基 - 5 - 二十七碳烯酸。这些化合物的3 - 饱和对应物，即19 - 甲基二十五烷酸、19 - 甲基二十六烷酸和19 - 甲基二十七烷酸，以及19 - 甲基二十四烷酸和20 - 甲基二十八烷酸也是该海绵中迄今未描述的酸。还检测到痕量的2种极长链酸，其结构暂定为19,21 - 二甲基二十七烷酸和20,22 - 二甲基二十八烷酸。还描述了这些脂肪酸根据磷脂头部基团的分布情况。
