Design, Synthesis and Biological Activity of 16,17-Dihydroheronamide C and ent-Heronamide C

16,17-Dihydroheronamide C (8) and ent-heronamide C (ent-1) were designed as probes for the mode-of-action analysis of heronamide C (1). These molecules were synthesized by utilizing a highly modular strategy developed in the preceding paper. Evaluation of the antifungal activity of these compounds revealed the exceptional importance of the C16-C17 double bond for the biological activity of heronamide C, and the existence of chiral recognition between heronamide C (1) and cell membrane components.