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N-Fmoc-7-methyl-L-tryptophan is a tryptophan derivative that appears as white crystals or a crystalline powder. This substance is a fundamental component of peptide drugs. Introducing non-natural amino acids into peptide drugs can significantly improve their stability, enhance their ability to cross the blood-brain barrier, and reduce their toxicity. Therefore, developing novel multifunctional non-natural amino acid blocks plays a crucial role in the research and development of peptide drugs.