A new polyacetylenic fatty acid and other secondary metabolites from the Chinese green alga Caulerpa racemosa (Caulerpaceae) and their chemotaxonomic significance

• Published in: Biochemical systematics and ecology Vol. 39; no. 4-6; pp. 253 - 257
• Main Authors: Mao, Shui-Chun, Liu, Ding-Quan, Yu, Xiao-Qing, Lai, Xiao-Ping
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2011
• Subjects: Caulerpa racemosa; Caulerpaceae; Diterpenes; diterpenoids; fatty acids; Polyacetylenic fatty acid; secondary metabolites; Sterols; Polyacetylenic fatty acid; Diterpenes; Caulerpa racemosa; Sterols; Caulerpaceae
• ISSN: 0305-1978; 1873-2925
• DOI: 10.1016/j.bse.2011.08.014

A new polyacetylenic fatty acid, (8E,12Z,15Z)-10-hydroxy-8,12,15-octadecatrien-4,6-diynoic acid (1), together with five known metabolites, including two linear diterpenes (3 and 4) and three sterols (5–7), has been isolated from the Chinese green alga Caulerpa racemosa. Its structure was determined on the basis of extensive spectroscopic analysis. Compound 1 represents the first example of polyacetylenic lipids from marine algae up to now, while compound 4 is characterized for the first time in the Caulerpaceae. Furthermore, the chemotaxonomic significance of these compounds was also summarized. A new polyacetylenic fatty acid, (8E,12Z15Z)-10-hydroxy-8,12,15-octadecatrien-4-6,-diynoic acid (1), has been isolated from the chinese green alga caulerpa racemosa. [Display omitted] ► A new polyacetylenic fatty acid was isolated from Caulerpa racemosa. ► The new compound is the first example of polyacetylenic lipids from marine algae. ► A linear diterpene is reported for the first time in the Caulerpaceae. ► Diterpenes and sterols could be chemotaxonomic markers within the species of Caulerpa.