Abstract
The isolation and characterization of six related bufadienolide glycosides, tyledosides A, B, C, D, F, and G from Tylecodon grandiflorus(Burm. F) Toelken are reported. The structure elucidation of these metabolites is based on a detailed study of their highfield 1H and 13C n.m.r. spectra. Extensive use was made of two-dimensional homonuclear and heteronuclear correlation experiments in the assignment of the n.m.r. spectra. The results obtained upon chemical derivatization of tyledosides A, C, and D are in agreement with the assigned structures.
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