3'-(9H-fluoren-9-ylmethoxycarbonylamino)-biphenyl-4-carboxylic acid
3'-[N-[(1,1-dimethylethoxy)carbonyl]-L-tryptophylamino][1,1'-biphenyl]-4-carbonyl-L-phenylalanine methyl ester
3'-[[(1,1-dimethylethoxy)carbonyl]amino]-[1,1'-biphenyl]-4-carbonyl-L-phenylalanine methyl ester