Cunninghamella elegans has been employed for the biotransformation of cinobufagin to afford 5 metabolites. The structures of the transformation products have been characterized as 12alpha-hydroxybufagin, 11alpha-hydroxybufagin, 12beta-hydroxy-desacetylcinobufagin, 3-oxo-12alpha-hydroxybufagin and 12beta-hydroxybufagin. Products 12alpha-hydroxybufagin and 11alpha-hydroxybufagin are new compounds. In vitro both the biotransformation products and cinobufagin all showed cytotoxic activities against HeLa cells.
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| http://dx.doi.org/10.1038/ja.2007.32 | DOI Listing |
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