A new phytoecdysone from the roots of Rhaponticum uniflorum.


A new ecdysteroid named rhapontisterone R1 (1) together with two known phytoecdysones, rhapontisterone (2) and ecdysterone (3) were isolated from the roots of Rhaponticum uniflorum (L.) DC. The new compound was shown to be 2beta,3beta,11alpha,14alpha,20xi,22xi-hexahydroxy-stigma-7,24(28)-dien-6-oxo-28,25-carbolactone. The structure has been determined… (More)


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