Four new steroid glycosides from the Vietnamese starfish <Emphasis Type="Italic">Linckia laevigata</Emphasis> |
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| Authors: | A A Kicha N V Ivanchina A I Kalinovsky P S Dmitrenok E V Sokolova I G Agafonova J Morre V A Stonik |
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| Institution: | (1) Pacific Institute of Bioorganic Chemistry of the Far Eastern Branch of the Russian Academy of Sciences, 159 prosp. 100 let Vladivostoku, 690022 Vladivostok, Russian Federation;(2) Department of Chemistry and Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon 97331, USA |
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| Abstract: | Eighteen steroid compounds, including four new steroid glycosides, viz., linckosides L3–L6, along with the previously known nine glycosides and five free polyhydroxysteroids, were isolated from
the starfish Linckia laevigata collected on the Vietnamese coast. New compounds contain the 2-O-methyl-β-D-xylopyranosyl unit at the C(3) atom of polyhydroxylated steroidal aglycone. Two of these compounds are monosides, and the
other two belong to biosides and have an additional β-D-xylopyranosyl residue at C(26) in the side chain of the aglycone. The structures of the new compounds were determined by
NMR spectroscopy, mainly by 2D NMR, and mass spectrometry.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 792–799, April, 2007. |
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| Keywords: | starfish Linckia laevigata polyhydroxylated steroid steroid glycoside NMR spectra |
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