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

(2S,3S,4E,6E,8S,9S)-3-(tert-butoxycarbonyl)amino-9-methoxy-2,6,8-trimethyl-10-phenyl-4,6-decadienoic acid

(2R,3S)-4-methyl N-tert-butoxycarbonyl-3-methylaspartate

(2R,3S)-2-[Benzyl-(9-phenyl-9H-fluoren-9-yl)-amino]-3-methyl-succinic acid 1-methyl ester

methyl(2S,3R)-3-tert-butoxycarbonylamino-4-methoxycarbonyl-3-methylbutanoic acid