Ab. Deoliveira et al., THE BIOTRANSFORMATION OF ENT-15-OXOKAUR-16-EN-19-OIC ACID AND ITS METHYL-ESTER BY CEPHALOSPORIUM-APHIDICOLA, Phytochemistry, 40(2), 1995, pp. 439-442
ent-15-Oxokaur-16-en-19-oic acid and its methyl ester are transformed
to ent-11 alpha, 16 beta-dihydroxy-15-oxokauran-19-oic acid and its me
thyl ester, respectively, by Cephalosporium aphidicola.