Z-ILE-VAL-OH

Z-L-Ile-L-Val-OH

Z-L-ISOLEUCYL-L-VALINE

N-[N-[(benzyloxy)carbonyl]-L-isoleucyl]-L-valine

2-[[2-(benzyloxycarbonylamino)-3-methyl-pentanoyl]amino]-3-methyl-butyric acid

3-methyl-2-[[3-methyl-2-(phenylmethoxycarbonylamino)pentanoyl]amino]butanoic acid