DC-FM-bar-Tyr(t-Bu)-Gly-Gly-Phe-Leu-O-t-Bu

4-nitrobenzyl ester of N-t-butyloxycarbonylglycylglycyl-L-phenylalanyl-L-leucine

Dts-Tyr(t-Bu)-Gly-Gly-Phe-Leu-OH

L-亮氨酸苄基酯

Z(OMe)-Gly-Phe-Leu-OBzl