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Boc-D-Leu-OH.H2O

N-Me-Leu-OBzl.TosOH

N-Me-Lys-OH.HCl

Fmoc-N-Me-Lys(Boc)-OH

Boc-b-HomoGln-OH

N-Me-Nle-OH.HCl

Fmoc-b-HomoLys(Boc)-OH