L-Valine, N- (3-hydroxy-7-mercapto-1-oxo-4-heptenyl)valyl- cysteinyl-2, 3-didehydro-2-aminobutanoyl-,xi-lactone, cyclic (1-2)-disulfide
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