[ON THE STABILITY OF SOME ADONIS AND CONVALLARIA PREPARATIONS].
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The structures of novel oligoglycosidic cardenolides, alepposide A (C55H86O23) [1] and alepposide B (C48H74O20) [2], have been deduced mainly by nmr methods. Based on homonuclear (1H and 13C nmr, 1H COSY) and proton-detected heteronuclear shift correlation experiments [HMQC both for 1J(C,H) and for long-range couplings], alepposide A [1] was shown to have the structure strophanthidin-3-O-beta-glucopyranosyl-(1-->4)-O-beta-diginopyranosyl -(1-->4)-O - beta-oleandropyranosyl-(1-->4)-O-beta-digitoxopyranosyl-(1-- >4)-O-beta- digitoxopyranoside. The structure of alepposide B [2] was established as strophanthidin-3-O-beta-glucopyranosyl-(1-->4)-O-beta-oleandropyranos yl- (1-->4)-O-beta-digitoxopyranosyl-(1-->4)-O-beta-digitoxopyranos ide.