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- W1971062023 abstract "Abstract The structures of two saponins, thyonosides A and B, isolated from the holothurian Thyone aurea collected in Namibia, were elucidated by 1D and 2D NMR ( 1 H, 13 C, 1 H– 1 H COSY, 1 H– 1 H J-resolved, TOCSY, HMQC, HMBC and NOESY). The two compounds have the same aglycon but different oligosaccharidic chains. Thyonoside A has a 3- O -methyl-β- d -xylopyranosyl-(1→3)-6- O -sodium sulphate-β- d -glucopyranosyl-(1→4)-β- d -quinovopyranosyl-(1→2)-4- O -sodium sulphate-β- d -xylopyranosyl chain, and thyonoside B a 3- O -methyl-β- d -xylopyranosyl-(1→4)-β- d -xylopyranosyl-(1→4)-β- d -quinovopyranosyl-(1→2)-4- O -sodium sulphate-β- d -xylopyranosyl chain. The holostane-type aglycon features an endocyclic double bond at position 7–8, a double bond at position 25–26 and a β-acetoxy group at C16." @default.
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- W1971062023 date "2004-03-01" @default.
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- W1971062023 title "Thyonosides A and B, two new saponins isolated from the holothurian Thyone aurea" @default.
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- W1971062023 doi "https://doi.org/10.1016/j.tet.2004.02.004" @default.
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