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2,5-Furandicarboxylic acid and its derivatives have a wide range of pharmaceutical applications as intermediates. For example, 2,5-furandicarboxylic acid can be used as an intermediate in the synthesis of various drugs, such as anticancer agents, antimicrobial agents, and anti-inflammatory agents. Its diethyl ester derivative can also be used as an intermediate in the synthesis of biologically active compounds, including antibiotics, antifungal agents, and antiviral agents. Additionally, 2,5-furandicarboxylic acid derivatives have potential applications as biodegradable and renewable polymers for drug delivery and tissue engineering.