Tert-butyl 3-((2S)-2-(((2S)-2-(((2S)-2-(((2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-phenyl-propanoyl)amino)-3-methyl-butanoyl)amino)-5-oxo-5-(tritylamino)pentanoyl)amino)-3-(((1S)-1-(((1S,2S)-1-(((1S)-2-(2-hydroxyethylamino)-1-methyl-2-oxo-ethyl)carbamoyl)-2-methyl-butyl)carbamoyl)-3-methyl-butyl)amino)-3-oxo-propyl)indole-1-carboxylate

protected peptide synthesis intermediate