Methyl 3-hydroxythiophene-2-carboxylate is used in medicine.
Carlos Corral and Jaime Lissavetzky. Reactions with methyl 3-hydroxythiophene-2-carboxylate. Part 2. A new route to mono- and di-alkyl ethers of thiotetronic and α-halogenothiotetronic acids. J. Chem. Soc., Perkin Trans. 1 1984, 2711-2714.
Barker; John M.; Huddleston; Patrick. Nitration of methyl-3-hydroxy- and 5-methyl-3-hydroxy-thiophene-2-carboxylate, and some chemistry of the products. Journal of Chemical Research. 2001, 2001 (10), 401-402.