prop-2-enyl (2S)-2-[[(2S)-2-[9H-fluoren-9-ylmethoxycarbonyl-[(2-hydroxy-4-methoxyphenyl)methyl]amino]propanoyl]amino]propanoate 、 prop-2-enyl (2S)-2-[[(2S,3R)-2-[9H-fluoren-9-ylmethoxycarbonyl-[(2-hydroxy-4-methoxyphenyl)methyl]amino]-3-[(2-methylpropan-2-yl)oxy]butanoyl]amino]propanoate 、
tert-butyl (3S)-3-[9H-fluoren-9-ylmethoxycarbonyl-[(2-hydroxy-4-methoxyphenyl)methyl]amino]-4-oxo-4-[[(2S)-1-oxo-1-prop-2-enoxypropan-2-yl]amino]butanoate 生成 (S)-N-{(1S,2R)-1-[(S)-1-((S)-5-Amino-1-{(S)-2-carboxy-1-[(S)-1-(carboxymethyl-carbamoyl)-ethylcarbamoyl]-ethylcarbamoyl}-pentylcarbamoyl)-pentylcarbamoyl]-2-hydroxy-propyl}-3-((S)-2-amino-3-carboxy-propionylamino)-succinamic acid