Fig. 4: Chemical derivatization and bioactivity profiling of jawsamycin.

Chemical variation of the dihydro uracil moiety (a-series) the dihydro uridine moiety (b-series) and the cyclopropylated fatty acid tail moiety (c-series) was undertaken with the natural compound as starting material. The obtained jawsamycin derivatives (numbered JD-X) were purified, structure verified and tested against the indicated four different fungal pathogens to obtain minimal effective concentrations (MEC).