H-半胱氨酸-甘氨酸-OH

2-[(2-amino-3-benzhydrylsulfanylpropanoyl)amino]acetic acid

N,N'-[N,N'-bis-(4-nitro-benzyloxycarbonyl)-L-cystyl]-bis-glycine

N,N'-di-p-nitrocarbobenzoxy-L-cystine

N,N'-[N,N'-bis-(4-nitro-benzyloxycarbonyl)-L-cystyl]-bis-glycine diethyl ester