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- W1990755370 abstract "Digitalis-Glykoside konnen am Genin und (oder) an den Zuckerresten verestert sein. Weil mit den bisherigen analytischen und praparativen Methoden die Stellung der Acetylgruppen nur sehr muhevoll festzulegen war, wurde versucht, dieses Problem mit Hilfe der NMR-Spektroskopie einfacher zu losen: Von je 31 bei Gitoxin und Digoxin moglichen Acetaten lassen sich jetzt 15 genau, die ubrigen bis auf die Stellung des Acetyls an den „inneren” Digitoxosen festlegen. Beim Digitoxin lassen sich von 15 moglichen Acetaten 7 genau, die ubrigen mit der gleichen Einschrankung bestimmen.Digitalis-glycosides may be esterified at the genine and (or) the sugar moiety. So far it has been difficult to determine the positions of the acetyl groups with known analytical and preparative methods. Therefore we tried to solve this problem by NMR-spectroscopy: By additional application of this method we can clarify the structure of 15 out of 31 possible acetyl derivatives of gitoxine and digoxine. The positions of the acetyl groups in the other esters can be proved as well, except those of the „inner” sugars. By the same method we determined the acetyl positions in 7 out of 15 possible digitoxine acetates, and of the remaining acetates those not attached to the „inner” digitoxose moieties." @default.
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- W1990755370 date "1968-01-01" @default.
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- W1990755370 title "NMR-spektroskopische Untersuchungen an acetylierten Digitalis-Glykosiden" @default.
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- W1990755370 doi "https://doi.org/10.1002/ardp.19683010306" @default.
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