Abstract
Studies on the microbial transformation of the sesquiterpene endoperoxide artemisitene have revealed that artemisitene was metabolized by
Aspergillus niger (NRRL 599) to yield 11-
epi-artemisinin, 9β-hydroxydeoxy-11-
epi-artemisinin and 9β-hydroxy-11-
epi-artemisinnin. These metabolites were characterized on the basis of their spectral data.