Tao, Zhu, Yu Deng, Yingjie Chen, Anmin Wang, and Xiangnan Hu. “Synthesis of Main Impurity of Vildagliptin”. Asian Journal of Chemistry 26, no. 12 (June 5, 2014): 3489–3492. Accessed December 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/26_13_11.