Studies of Peptide Antibiotics. III. Cyclo-(l-valyl-l-ornithyl-l-leucyl-d-phenylalanylglycyl)2

Abstract
A cyclic decapeptide, cyclo-(L-valyl-L-ornithyl-L-leucyl-D-phenylalanylglycyl)2, has been synthesized in an attempt to obtain information about the relation of the structure to the antibacterial activity of gramicidin S.