(2R,3S)-2-tert-Butoxycarbonylamino-3-methyl-N-[(S)-1-(2,2,2-trichloro-ethoxycarbonyl)-ethyl]-succinamic acid methyl ester

(S)-2-((R)-2-{2-[((R)-4-tert-Butoxycarbonylamino-4-methoxycarbonyl-butyryl)-methyl-amino]-acryloylamino}-propionylamino)-4-methyl-pentanoic acid

(S)-2-((R)-2-{2-[((R)-4-tert-Butoxycarbonylamino-4-methoxycarbonyl-butyryl)-methyl-amino]-acryloylamino}-propionylamino)-4-methyl-pentanoic acid tert-butyl ester

(2R,3S)-2-[(S)-2-((R)-2-{2-[((R)-4-Amino-4-methoxycarbonyl-butyryl)-methyl-amino]-acryloylamino}-propionylamino)-4-methyl-pentanoylamino]-3-[(S)-1-(2,2,2-trichloro-ethoxycarbonyl)-ethylcarbamoyl]-butyric acid methyl ester

Boc-Adda-D-iso-Glu(OMe)-MeΔAla-(D)-Ala-(L)-Leu-(D)-erythro-β-Me-iso-Asp(OMe)-(L)-Ala-OTce