上游原料
1-trityl-1H-imidazole-4-carbaldehyde；1-Tritylimidazole-4-carboxaldehydemethyl (2S)-2-([[5-(aminomethyl)-2'-methyl[1,1'-biphenyl]-2-yl]carbonyl]amino)-4-(methylsulfanyl)butanoatemethyl (2S)-4-(methylsulfanyl)-2-([[2'-methyl-5-([[(1-trityl-1H-imidazol-4-yl)methyl]amino]methyl)[1,1'-biphenyl]-2-yl]carbonyl]amino)butanoatemethyl (2S)-2-[[(5-[[(1H-imidazol-4-ylmethyl)amino]methyl]-2'-methyl[1,1'-biphenyl]-2-yl)carbonyl]amino]-4-(methylsulfanyl)butanoate
