摘要:
The microbial transformation of digitoxin (I) by Streptomyces sp. yielded digoxin (III) as main product along with the by-products 7beta -hydroxydigitoxin (II) and 7beta -hydroxydigoxin (IV). The present paper is concerned with the structure elucidation of 7beta-hydroxycardenolides as well as with the formation of some of their derivatives.