L-Valine, N-(3-Hydroxy-7-Mercapto-1-Oxo-4-Heptenyl)-D-Valyl-D-Cysteinyl-(Z)-2,3 -Didehydro-2-Aminobutanoyl-, xi-Lactone, Cyclic (1-2)-Disulfide, (S-(E))-
N-[(3S,4E-3-hydroxy-7-mercapto-1-oxo-4-heptenyl]-D-valyl-D-cysteinyl-(2Z)-2-amino-2-butenoyl-L-valine, (4->1) lactone, cyclic