How is (2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[2-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-3-phenylpropanoyl]amino]-4-methylpentanoyl]amino]-3-(1H-indol-3-yl)propanoyl]amino]acetyl]pyrrolidine-2-carbonyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]propanoyl]amino]-4-methylpentanoyl]amino]-3-methylbutanoic acid (CAS: 160295-81-8) typically synthesized?

The synthesis of this compound typically involves multi-step peptide synthesis using solid-phase methods. Commonly, a protected amino acid is first synthesized, followed by sequential coupling reactions and deprotection steps. The use of coupling reagents such as HATU and protecting groups like Boc or Fmoc is typical in such syntheses. The final product is obtained with high yield and selectivity, though the process is complex and requires careful optimization.