New triterpene oligoglycosides from the Caribbean sponge Erylus formosus |
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| Authors: | Antonov Alexandr S Kalinovsky Anatoly I Dmitrenok Pavel S Kalinin Vladimir I Stonik Valentin A Mollo Ernesto Cimino Guido |
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| Institution: | aPacific Institute of Bioorganic Chemistry, Far East Division of the Russian Academy of Science, 690022 Vladivostok, Russia;bInstituto di Chimica Biomolecolare (CNR), Via Campi Flegrei 34, 80078 Pozzuoli, Naples, Italy |
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| Abstract: | Seven new triterpene glycosides, erylosides R1 (1), T1 (3), T2 (4), T3 (5), T4 (6), T5 (7), and T6 (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-3β-ol. |
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| Keywords: | Erylus formosus Marine sponges Erylosides Triterpene glycosides |
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