Islanditoxin, a Toxic Metabolite produced by Penicillium islandicum Sopp

Part III. Structure of Islanditoxin

Abstract

Islanditoxin is a novel peptide consisted of five amino acids, three of which have been known as normal components of proteins and the remaining two, D-β-phenyl-β-aminopropionic acid and L-dichloroproline have not been encountered previously in nature. The structure of islanditoxin is shown to be a cyclic polypeptide, represented by formula (VIII).