Tonakiamides A and B, Antitrypanosomal Lipopeptides Isolated from a Marine Okeania sp. Cyanobacterium
The structure elucidation of peptidic natural products is often hindered by extensive N-methylation and repetitive sequence motifs, which complicate NMR spectral analysis. Tonakiamides A and B (1 and 2), two lipopeptides isolated from a marine Okeania sp. cyanobacterium collected in Japan, represent such challenging...