Abstract
The fungus Cordyceps militaris converts exogenous adenine into cordycepin. When grown on suitable media, all the 8 fungi tested, including C. militaris converted 4-aminopyrazolo[3, 4-d]pyrimidine into a ribo-side and, with the exception of Scopulariopsisbrevicaulis, into 4-hydroxypyrazolo [3, 4-d] pyrimidine riboside. C. militaris was grown on media containing 2, 6-diaminobenzothiazole, 5-amino-1, 2-dimethyl-benzimidazole and 5-amino-2-oxobenzimidazoline, and it converted these compounds into the corresponding monoacetyl derivatives.