Journal
CARBOHYDRATE RESEARCH
Volume 346, Issue 14, Pages 2182-2192Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2011.07.008
Keywords
Erylus formosus; Marine sponges; Erylosides; Triterpene glycosides
Funding
- Pacific Institute of Bioorganic Chemistry of the Russian Academy of Sciences (Russia)
- Instituto di Chimoca Biomoleculare (ICB-CNR), Italy
- Presidium of the Russian Academy of Science
- Russian Federation Program for Support of the Leading Scientific Schools [3531.2010.4]
- Russian Foundation for Basic Research [11-04-00480-a]
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Seven new triterpene glycosides, erylosides R-1 (1). T-1 (3), T-2 (4), T-3 (5), T-4 (6), T-5 (7), and T-6 (8) along with the known formoside (2) were isolated from the sponge Erylus formosus collected along the Caribbean coast of Mexico. Glycoside 1 was determined as a trisaccharide, glycoside 2 as a tetrasaccharide while glycosides 3-8 were hexasaccharide. Their carbohydrate chains were unprecedented and have never been found in oligosaccharides from other biological sources, except Erylus spp. Three carbohydrate chains in the glycosides 3 and 6, 4 and 7, 5 and 8 correspondingly are new. The glycosides 1-5 have penasterol as aglycone while glycosides 6-8 proved to be glycoconjugates of 24-methylene-14-carboxy-lanost-8(9)-en-3 beta-ol. (C) 2011 Elsevier Ltd. All rights reserved.
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