Structure-activity relationship studies of tanzawaic acid A, an antifungal agent against Rhizopus oryzae.

Through structure-activity relationship studies of tanzawaic acid A (TZAA), this research aims to contribute the development of potent antifungal drugs for treating mucormycosis infections. To this end, new TZAA analogs bearing chemical modifications in the side chain and/or C8-methyl group moieties were synthesized. These analogs are not accessible from natural TZAA and therefore required total synthesis. As a result, four of the newly synthesized TZAA analogs exhibited more potent and selective inhibitory activity against R. oryzae compared to TZAA.