1. Pharmaceutical Field (Core Applications) a. Pharmaceutical Intermediates: Used in the synthesis of anti-HIV drugs, antidepressants, antibacterial agents, and more, serving as key building blocks for chiral drug molecules. b. Drug Optimization Raw Materials: Utilized to modify drug molecules through their chiral structures, enhancing the bioactivity, selectivity, and metabolic safety of drugs. c. Peptide Drug Synthesis: Acts as a component of polypeptide chains, employed in the preparation of peptide drugs with specific physiological functions (e.g., antimicrobial peptides, regulatory peptides). 2. Fine Chemical Industry a. Chiral Catalyst Ligands: Can coordinate with metal ions to prepare chiral catalysts, used in asymmetric synthesis reactions (e.g., hydrogenation, cycloaddition reactions). b. Organic Synthesis Intermediates: Applied in the synthesis of dyes, fragrances, food additives, etc., with their cyclic structures imparting special properties to the products. 3. Materials Science Field a. Polymer Material Monomers: Used in the preparation of functional polymer materials (e.g., polyamides, polyurethanes), enhancing the mechanical strength and biocompatibility of the materials. b. Biomaterial Modifiers: Employed to modify biomedical materials (e.g., artificial cartilage, tissue engineering scaffolds), improving their cell compatibility and degradation properties.