“…Sixteen naturally-occurring chartarin glycosides have been reported to date as bacterial metabolites (mainly from Streptomyces, Fig. 25) including the chartreusins (lambdamycins), [423][424][425][426][427][428][429][430][431][432][433] chrymutasins, [434][435][436] D329C, 437 elsamicins, [438][439][440] and hayumicins. 441 These compounds display notable antimicrobial and antitumor activities where glycosylation plays a key role in improving potency, formulation and in vivo properties wherein aminosugar-containing variants are among the most advantagous.…”