Nα'-(triphenylmethylglycyl-asparaginyl-leucyl-O-tert-butylseryl-O-tert-butylthreonyl)-Nα-tert-butyloxycarbonylcystathionine α'-hydrazide
Nα'-(triphenylmethylglycyl-asparaginyl-leucyl-O-tert-butylseryl-O-tert-butylthreonyl)-Nα-tert-butyloxycarbonylcystathionine α'-methyl ester
triphenylmethylglycyl-asparaginyl-leucyl-O-tert-butylseryl-O-tert-butylthreonine hydrazide
triphenylmethylglycyl-asparaginyl-leucyl-O-tert-butylseryl-O-tert-butylthreonine methyl ester
N-o-nitrobenzenesulphenylasparaginyl-leucyl-O-tert-butylseryl-O-tert-butylthreonine methyl ester