Arthrichitin. A New Cell Wall Active Metabolite from Arthrinium phaeospermum.

Arthrichitin (1), C33H46N4O9, is a new cell wall active depsipeptide isolated from the fermentation broth of Arthrinium phaeospermum (HIL Y-903022). Its structure was elucidated on the basis of spectroscopic and chemical degradation studies. Arthrichitin consists of serine, β-keto tryptophan, glutamic acid, and 2,4-dimethyl-3-hydroxydodecanoic acid units.