N-(t-BuOCO-)-L-Phe-L-Phe-L-Trp-N6-[[2-(Methylsulfonyl)ethoxy]carbonyl]-L-Lys-L-Thr-L-Phe-L-Thr-L-Ser-S-Acm-L-Cys-OH2-[[[4-(phenylazo)phenyl]methyl]sulfonyl]ethyl

l-Cysteine, S-[(acetylamino)methyl]-N-[N-[N-[N-[N-[N2-[N-[N-[N-[(1,1-dimethylethoxy)carbonyl]-l-phenylalanyl]-l-phenylalanyl]-l-tryptophyl]-N6-[[2-(methylsulfonyl)ethoxy]carbonyl]-l-lysyl]-l-threonyl]-l-phenylalanyl]-l-threonyl]-l-seryl]-,