Triterpene Glycosides from Antarctic Sea Cucumbers. 2. Structure of Achlioniceosides A1, A2, and A3 from the Sea Cucumber Achlionice violaecuspidata (=Rhipidothuria racowitzai)
Journal of Natural Products2008Vol. 72(1), pp. 33–38
Citations Over TimeTop 11% of 2008 papers
Alexandr S. Antonov, Sergey A. Avilov, Anatoly I. Kalinovsky, Stanislav D. Anastyuk, Pavel S. Dmitrenok, Vladimir I. Kalinin, Sergi Taboada, Aina Bosh, Conxita Àvila, Valentin A. Stonik
Abstract
Three new triterpene glycosides, achlioniceosides A(1) (1), A(2) (2), and A(3) (3), have been isolated from the Antarctic sea cucumber Achlionice violaecuspidata. The glycoside structures were elucidated using extensive NMR spectroscopic analysis including one-dimensional (1)H and (13)C spectra, (1)H-(1)H-COSY, HMBC, HMQC, and NOESY and mass spectrometry. Gycosides 1-3 are disulfated pentaosides that are branched at the first xylose residue. The sulfates are attached to C-6 of the glucose residues. Glycosides 1-3 are the first triterpene glycosides isolated from a sea cucumber belonging to the order Elasipodida.
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