6-Hydroxymethyl nicotinic acid methyl ester is an organic compound featuring a pyridine ring substituted with a hydroxymethyl group at the 6-position and a methoxycarbonyl group at the 3-position. It is a white to off-white crystalline powder. This compound is primarily utilized as a key pharmaceutical intermediate. Its most notable application is in the synthesis of Teneligliptin, a dipeptidyl peptidase-4 (DPP-4) inhibitor used for the treatment of type 2 diabetes. The hydroxymethyl and ester functional groups make it a versatile building block for constructing more complex molecules, particularly those containing the nicotinic acid (pyridine-3-carboxylic acid) scaffold. As a functionalized pyridine derivative, it serves as a valuable heterocyclic building block in medicinal chemistry research. Its dual functionality allows for further chemical modifications, making it useful for the development of various bioactive compounds beyond its primary role in antidiabetic drug synthesis.