1,1'-[[(propane-1,3-diyl)dioxy]bis[(2S,4R)-(5-methoxy-2-amino-1,4-phenylene)carbonyl]]bis[2-(tert-butyldimethylsilyloxymethyl)-4-oxyacetylpyrrolidine]

1,1'-[[(propane-1,3-diyl)dioxy]bis[(2S,4R)-(5-methoxy-2-nitro-1,4-phenylene)carbonyl]]bis[2-(tert-butyldimethylsilyloxymethyl)-4-oxyacetylpyrrolidine]

1,1'-[[(pentane-1,5-diyl)dioxy]bis[(2S,4R)-(5-methoxy-2-nitro-1,4-phenylene)carbonyl]]bis[2-(tert-butyldimethylsilyloxymethyl)-4-hydroxyacetylpyrrolidine]

1,1'-[[(pentane-1,5-diyl)dioxy]bis[(11S,11aS,2R)-10-(2,2,2-trichloroethoxycarbonyl)-11-hydroxy-7-methoxy-2-hydroxyacetyl-1,2,3,10,11,11a-hexahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-one]]

1,1'-[[(pentane-1,5-diyl)dioxy]bis[(2S,4R)-[5-methoxy-1,4-phenylene-2-(2,2,2-trichloroethoxycarbonylamino)]carbonyl]]bis[2-(tert-butyldimethylsilyloxymethyl)-4-hydroxyacetylpyrrolidine]