Abstract
The Cascarosides A, B, C and D, for the first time isolated by FAIRBAIRN et al. from the bark of Rhamnus purshianus DC, have been structurally elucidated as 8-O-β-D-glucopyranosides of aloin and 11-desoxy-aloin respectively by means of partial hydrolysis, NMR spectroscopy, sugar analysis and DC measurements.

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