A new asterosaponin named novaeguinoside A, along with a known saponin, asteronyl pentaglycoside sulfate, was isolated from the starfish Culcita novaeguineae. The new compound was identified to be sodium 6α-O-{β-D-f...A new asterosaponin named novaeguinoside A, along with a known saponin, asteronyl pentaglycoside sulfate, was isolated from the starfish Culcita novaeguineae. The new compound was identified to be sodium 6α-O-{β-D-fucopyranosyl-(1→2)-β-D-fucopyranosyl-(1→4)-[β-D- quinovopyranosyl-(1→2)]-β-D-xylopyranosyl-(1→3)-β-D-quinovopyranosyl}-5α-pregn-9(11)-en- 20-one-3β-yl-sulfate by extensive spectral analysis and chemical evidence.展开更多
Two new 24-hydroxylated asterosaponins, sodium （20R,24S）-6α-O-（4-O-sodiumsulfato-β-D-quinovopyranosyl）-5α-cholest- 9（11）-en-3β,24-diol 3-sulfate （1） and sodium （20R,24S）-6α-O-β-O-methyl-β-D-quinovopyr...Two new 24-hydroxylated asterosaponins, sodium （20R,24S）-6α-O-（4-O-sodiumsulfato-β-D-quinovopyranosyl）-5α-cholest- 9（11）-en-3β,24-diol 3-sulfate （1） and sodium （20R,24S）-6α-O-β-O-methyl-β-D-quinovopyranosyl-（1→2）-β-D-xylopyranosyl- （1 → 3）-[3-D-glucopyranosyl]-5α-cholest-9（11）-en-3β,24-diol 3-sulfate （2）, were isolated from the starfish Culcita novaeguineae. Their structures were elucidated by extensive spectral analysis and chemical evidences.展开更多
The by-catch fauna of the shrimp fishery includes a number of marine invertebrates that are discarded because they do not have commercial value.In order to try to add some value to these materials,we analyzed the chem...The by-catch fauna of the shrimp fishery includes a number of marine invertebrates that are discarded because they do not have commercial value.In order to try to add some value to these materials,we analyzed the chemical composition of the starfish Luidia senegalensis collected in the Brazilian coast as a consequence of the trawling fishery method.In order to access their chemical composition,we used a combination of solid phase extraction(SPE)followed by ultra-high performance liquid chromatography coupled to electrospray ionization ion trap tandem mass spectrometry(UPLC-ESI-IT-MSn).Luidia sene-galensis contains asterosaponins,which are sulphated glycosilated steroids,containing five and six sugar moieties,in addition to polyhydroxysteroids.This study helped us to support the presence of important and potentially bioactive compounds in invertebrates associated to the by-catch fauna of the shrimp fishery,using a fast and efficient method.展开更多
文摘A new asterosaponin named novaeguinoside A, along with a known saponin, asteronyl pentaglycoside sulfate, was isolated from the starfish Culcita novaeguineae. The new compound was identified to be sodium 6α-O-{β-D-fucopyranosyl-(1→2)-β-D-fucopyranosyl-(1→4)-[β-D- quinovopyranosyl-(1→2)]-β-D-xylopyranosyl-(1→3)-β-D-quinovopyranosyl}-5α-pregn-9(11)-en- 20-one-3β-yl-sulfate by extensive spectral analysis and chemical evidence.
基金the National Nature Science Foundation of China(No.20502035)the National High-Tech Research and Development Project(No.2006AA09Z423)
文摘Two new 24-hydroxylated asterosaponins, sodium （20R,24S）-6α-O-（4-O-sodiumsulfato-β-D-quinovopyranosyl）-5α-cholest- 9（11）-en-3β,24-diol 3-sulfate （1） and sodium （20R,24S）-6α-O-β-O-methyl-β-D-quinovopyranosyl-（1→2）-β-D-xylopyranosyl- （1 → 3）-[3-D-glucopyranosyl]-5α-cholest-9（11）-en-3β,24-diol 3-sulfate （2）, were isolated from the starfish Culcita novaeguineae. Their structures were elucidated by extensive spectral analysis and chemical evidences.
基金supported by Funda-cao de Amparo a Pesquisa do Estado de Sao Paulo(FAPESP Grant 2012/19419-9 to W.V.and Grant 2011/23159-0 to M.M.P.T.)。
文摘The by-catch fauna of the shrimp fishery includes a number of marine invertebrates that are discarded because they do not have commercial value.In order to try to add some value to these materials,we analyzed the chemical composition of the starfish Luidia senegalensis collected in the Brazilian coast as a consequence of the trawling fishery method.In order to access their chemical composition,we used a combination of solid phase extraction(SPE)followed by ultra-high performance liquid chromatography coupled to electrospray ionization ion trap tandem mass spectrometry(UPLC-ESI-IT-MSn).Luidia sene-galensis contains asterosaponins,which are sulphated glycosilated steroids,containing five and six sugar moieties,in addition to polyhydroxysteroids.This study helped us to support the presence of important and potentially bioactive compounds in invertebrates associated to the by-catch fauna of the shrimp fishery,using a fast and efficient method.
