Boc-(R)-β3-HVal-(S)-β3-HAla-(S)-β3-HLeu-OMe

(S)-3-[(S)-3-((R)-3-tert-Butoxycarbonylamino-4-methyl-pentanoylamino)-butyrylamino]-5-methyl-hexanoic acid (S)-2-carboxy-1-methyl-ethyl ester

(S)-3-[(S)-3-((R)-3-{(S)-3-[(S)-3-((R)-3-tert-Butoxycarbonylamino-4-methyl-pentanoylamino)-butyrylamino]-5-methyl-hexanoylamino}-4-methyl-pentanoylamino)-butyrylamino]-5-methyl-hexanoic acid pentafluorophenyl ester

Boc-(R)-β3-HVal-(S)-β3-HAla-(S)-β3-HLeu-(R)-β3-HVal-(S)-β3-HAla-(S)-β3-HLeu-OBn

Boc-(S)-β3-HAla-(R)-β3-HVal-(S)-β3-HAla-(S)-β3-HLeu-OMe

Boc-(R)-β3-HVal-(S)-β3-HAla-(S)-β3-HLeu-β-HGly-(R)-β3-HVal-(S)-β3-HAla-(S)-β3-HLeu-OH