Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Studies on the Constituents of Digitalis purpurea L. XXIV. On the Structures of Purlanosides-A and -B.
Kazuhiko Hoji
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1961 Volume 9 Issue 7 Pages 566-571


It was already reported that purlanosides-A and -B were isomers of lanatosides-A and -B. By partial acid hydrolysis, purlanoside-A afforded three new products and one of them was found to be digitoxigenin acetyldigitoxoside, by subsequent deacetylation and acid hydrolysis. Therefore, it was assumed that the acetyl group of purlanoside-A is in the first digitoxose and its structure is formulated as digitoxigenin glucosido-bisdigitoxo-sido-acetyldigitoxoside. Purlanoside-B also afforded gitoxigenin acetyldigitoxoside by the same hydrolysis. Therefore, the acetyl group is also in the first digitoxose, and its structure is formulated as gitoxigenin glucosido-bisdigitoxosido-acetyldigitoxoside. Further, it was determined that the acetyl groups of acetyldigitoxin-γ and acetyl-gitoxin-γ are in the first digitoxose.

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