H-Glu(OMe)...

H-Cys-OMe....

H-Arg-OEt

H-Phg-OMe....

H-Aib-OtBu...

TBTU

PyBOP

HOAt

HBTU

HATU

Z-Tyr(Bzl)...

Z-Trp-OSu

Z-Thr-OH

Z-Thr-NH2 ...

Z-D-Ser(tB...

Z-Ser(Bzl)...

Z-Pro-OH

Z-Pro-NH2

Z-Phe-OSu

Z-Orn-OH

Z-Met-OH ...

Z-Lys-OMe旽...

Z-Leu-Osu ...

Z-Leu-OH

Z-ILe-OH ...

Z-Hyp-OMe ...

Z-Gly-NH2 ...

Z-Gln-OH

Z-Glu(OEt)...

Z-Glu-OtBu