CAS No. 1871-57-4 refers to a chemical compound known as N-(tert-butoxycarbonyl)-L-leucine. It is widely used in the pharmaceutical industry as a precursor in the synthesis of complex peptides and proteins. N-(tert-butoxycarbonyl)-L-leucine is considered an essential building block in the creation of several biologically active molecules that are commonly used in the manufacture of drugs. It acts as a strong protecting group for amino acids and also facilitates the introduction of multiple functionalities into a peptide chain. This compound has excellent solubility characteristics, making it highly desirable for the synthesis of peptide-based pharmaceuticals. Additionally, its ability to protect amino acids from unwanted chemical reactions helps to ensure the successful synthesis of complex peptide chains. N-(tert-butoxycarbonyl)-L-leucine is also used in the production of various biochemicals, such as enzyme inhibitors, and for the preparation of molecular probes. Its unique chemical properties make it an important raw material in the pharmaceutical and biotech industries. In summary, CAS No. 1871-57-4, or N-(tert-butoxycarbonyl)-L-leucine, is a valuable compound for the synthesis of complex peptides and proteins. Its wide range of applications in the pharmaceutical industry makes it an important raw material for drug discovery and development.

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