Shikimic Acid is a naturally occurring cyclohexene-type organic acid with the chemical formula C₂H₁₀O₅. It is widely found in plants such as star anise (Illicium verum), ginkgo, and conifers. At room temperature, it appears as a white crystalline powder, soluble in water, and serves as a key intermediate in the plant biosynthetic pathway for aromatic amino acids (e.g., phenylalanine, tyrosine). Traditionally extracted from star anise fruits, modern production also utilizes microbial fermentation (e.g., engineered E. coli). As a vital precursor in synthetic biology and medicinal chemistry, shikimic acid holds an irreplaceable position in the pharmaceutical field, particularly in antiviral drug synthesis.

The core efficacy of shikimic acid lies in its role as a critical biosynthetic precursor. In pharmaceuticals, it is the indispensable starting material for synthesizing the anti-influenza drug oseltamivir (Tamiflu), converted through multiple chemical steps into a neuraminidase inhibitor. In plants, the shikimic acid pathway directly regulates the synthesis of defense compounds (e.g., salicylic acid) and growth hormones. Additionally, studies suggest shikimic acid itself exhibits certain anti-inflammatory, antioxidant, and antithrombotic activities, though research on its direct bioactivity remains preliminary. Currently, its primary value centers on being a key pharmaceutical intermediate, supporting the global supply chain for antiviral drug production.

Shikimic acid is primarily used in the pharmaceutical industry as a crucial raw material for synthesizing anti-influenza drugs like oseltamivir and zanamivir. In agrochemicals, it serves as a precursor for developing eco-friendly herbicides and plant growth regulators. The food industry may employ it as a natural preservative or intermediate in flavor synthesis. In scientific research, it is used as a model molecule for studying plant secondary metabolism and microbial synthetic pathways. In recent years, its applications have expanded into developing novel anti-infective drugs, anticancer drug precursors, and green manufacturing based on synthetic biology, showcasing broad potential for future growth.