Boc-L-Pyroglutamic acid methyl ester
Boc-L-Pyroglutamic acid ethyl ester/Boc-Pyr-Oet
Boc-beta-Alanine
Z-Gln(Trt)-OH
Boc-Glycine tert-butyl ester
Boc-L-Leu.H2O
Boc-D-Arg HCl.H2O
Boc-D-Arg HCl
Boc-Glycine
H-Thr(tBu)-OH
H-Asp(OtBu)-OH
H-Tyr(tBu)-OH
H-Glu(OtBu)-OH
H-Ser(tBu)-OH
N₆-Cbz-L-Lysine
H-Gln(Trt)-OH