Antibiotics from Gliding Bacteria, LXX Chondramides A–D, New Cytostatic and Antifungal Cyclodepsipeptides from Chondromyces crocatus (Myxobacteria): Isolation and Structure Elucidation

As a result of the extension of our screening to strains of Chondromyces four new antifungal and highly cytostatic depsipeptides were isolated, the chondramides A (1) – D (4). Their macrocyclic structures comprise three amino acids and a polyketide, viz. alanine, N‐methyltryptophan, α‐methoxyl‐β‐tyrosine, and a 7‐hydroxytrimethyloctenoic acid. Thus, they were found to be closely related to a small class of cyclodepsipeptides including jaspamide, the geodiamolides, and neosiphoniamolide which all have been isolated from marine sponges.