GOB Chemistry
ii. Iso-Thr-Srn-Phe
iii. ITSP
ii. Isn-Thr-Ser-Pnl
iii. ITRP
ii. Ile-Trn-Ser-Phe
iii. ITRF
ii. Ile-Thr-Ser-Phe
iii. ITSF