Boc-Ala-Gly-Gly-OH

For-L-norleucine

DL-Tryptophan Ethyl Ester Hydrochloride

DL-色氨酸乙酯盐酸盐

Gly-Tyr-Gly-OH

His-Gly-Gly-OH

Gly-Gly-Gly-Gly-OH

Pro-Trp-OH

Pro-Gly-OH

Ophthalmic acid

b-(4-Methylbenzyl)mercapto-b,b-cyclopenta-methylene-propionic acid