t-butyloxycarbonyl-tryptophyl-isoleucyl-alanyl-aminoisobutyryl-isoleucyl-valyl-aminoisobutyryl-leucyl-aminoisobutyryl-proline methyl ester
t-butyloxycarbonyl-tryptophyl-isoleucyl-alanyl-aminoisobutyryl-isoleucyl-valyl-aminoisobutyryl-leucyl-aminoisobutyryl-proline methyl ester