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))-
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))-