The alkaline treatment of 17(R)-hydroxyeicosatetraenoylphloroglucinol and eicosapentaenoylphloroglucinol, which are the major components of the methanol extract of the brown alga, Zonaria diesingiana (Dictyota) afforded 17(R)-hydroxyeicosatetraenoic and eicosapentaenoic acids, respectively, in good yields. The conformation of methyl ester of the 17(R)-hydroxy acid in a solution was studied by using
的17(碱处理- [R)-hydroxyeicosatetraenoylphloroglucinol和eicosapentaenoylphloroglucinol,它们是褐藻的
甲醇提取物的主要成分,Zonaria diesingiana得到17((Dictyota)- [R分别) -羟基和二十碳五酸,以良好产率。使用2NMA(手性各向异性试剂)研究了溶液中17(R)-羟基酸甲酯的构象。