Long-chain aliphatic wax esters isolated from the sponge Chalinula saudensis (Demospongia) along the Jeddah coast of the Red Sea

  • Abdulmohsin Al-Sofyani King Abdulaziz University; Faculty of Marine Science; Department of Marine Biology
  • Radwan K Al-Farawati King Abdulaziz University; Faculty of Marine Science; Department of Marine Chemistry
  • Amr A ElMaradny King Abdulaziz University; Faculty of Marine Science; Department of Marine Chemistry
  • Gul R Niaz King Abdulaziz University; Faculty of Marine Science; Department of Marine Chemistry
Keywords: Chalinula saudensis, Fatty acid esters, Jeddah coast

Abstract

The sponge Chalinula saudensis, which occurs along the Jeddah coast, has only recently been isolated and identified. In this study, the total crude organic matter of the sponge was extracted by solvents. The total crude extract was further separated by partitioning it with hexane and water, then with water and chloroform, and finally with water and t-butanol. The chloroform layer was subjected to separation by preparative layer chromatography on silica. One fraction contained four long-chain fatty acid esters, C28H56O2, C30H60O2, C32H62O2 and C36H70 O2. The second ester, C30H60O2, has been identified in the fire corals Millepora dichotoma and Millepora platyphylla. The others have not previously been reported from marine organisms; however similar long-chain esters with different long aliphatic chains and with different molecular weights have been identified from other marine organisms. These compounds are normally waxy and their presence in Chalinula saudensis plays a vital role in the biosynthetic pathways. They also act as insulators against seasonal variations.

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Published
2011-03-01
How to Cite
Al-Sofyani, A., Al-Farawati, R., ElMaradny, A., & Niaz, G. (2011). Long-chain aliphatic wax esters isolated from the sponge Chalinula saudensis (Demospongia) along the Jeddah coast of the Red Sea. Brazilian Journal of Oceanography, 59(1), 1-6. https://doi.org/10.1590/S1679-87592011000100001
Section
naodefinida