(Dct)2-cys 104077-25-0 L-Cysteine, N-(6-((2,4-dinitrophenyl)amino)-1-oxohexyl)-L-tyrosyl-, (2-2')-disulfide N,N'-Bis((epsilon-((2,4-dinitrophenyl)amino)caproyl)tyrosyl)cystine N-(6-((2,4-Dinitrophenyl)amino)-1-oxohexyl)-L-tyrosyl-L-cysteine (2-2')-disulfide