rac-1-(benzyloxycarbonyl)-2-tert-butyl-3-(methoxyglycylglycyl)imidazolidin-4-one
N-(tert-butyloxycarbonyl)-S-(4-methoxybenzyl)cysteinyl-glycyl-glycyl-glycine methyl ester
N-(tert-butyloxycarbonyl)-S-(4-methoxybenzyl)cysteinyl-glycyl-glycyl-glycyl-phenylalanyl-S-tritylcysteine methyl ester
N-(tert-butyloxycarbonyl)-S-(4-methoxybenzyl)cysteinyl-glycyl-glycyl-glycyl-phenylalanyl-S-(4-methoxybenzyl)cysteine methyl ester
N-(tert-butyloxycarbonyl)hemicystinyl1->S6>-glycyl-glycyl-glycyl-phenylalanyl-hemicystinyl6->S1> methyl ester